31546274040 has 512 divisors, whose sum is σ = 111767040000. Its totient is φ = 7905558528.

The previous prime is 31546274029. The next prime is 31546274041. The reversal of 31546274040 is 4047264513.

31546274040 is a `hidden beast` number, since 3 + 1 + 546 + 2 + 74 + 0 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31546273986 and 31546274004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31546274041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 211719886 + ... + 211720034.

It is an arithmetic number, because the mean of its divisors is an integer number (218295000).

Almost surely, 2^31546274040 is an apocalyptic number.

31546274040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31546274040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55883520000).

31546274040 is an abundant number, since it is smaller than the sum of its proper divisors (80220765960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31546274040 is a wasteful number, since it uses less digits than its factorization.

31546274040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 31546274040 in words is "thirty-one billion, five hundred forty-six million, two hundred seventy-four thousand, forty".