31368261880 has 16 divisors (see below), whose sum is σ = 70578589320. Its totient is φ = 12547304736.

The previous prime is 31368261877. The next prime is 31368261901. The reversal of 31368261880 is 8816286313.

It is a super-2 number, since 2×31368261880² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31368261880.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 392103234 + ... + 392103313.

Almost surely, 2^31368261880 is an apocalyptic number.

It is an amenable number.

31368261880 is an abundant number, since it is smaller than the sum of its proper divisors (39210327440).

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

31368261880 is a wasteful number, since it uses less digits than its factorization.

31368261880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784206558 (or 784206554 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 31368261880 in words is "thirty-one billion, three hundred sixty-eight million, two hundred sixty-one thousand, eight hundred eighty".