161274760920 has 192 divisors, whose sum is σ = 645099174720. Its totient is φ = 34027195392.

The previous prime is 161274760891. The next prime is 161274760957. The reversal of 161274760920 is 29067472161.

161274760920 is a `hidden beast` number, since 1 + 6 + 12 + 7 + 4 + 7 + 609 + 20 = 666.

161274760920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 2428699 + ... + 2494218.

It is an arithmetic number, because the mean of its divisors is an integer number (3359891535).

Almost surely, 2^161274760920 is an apocalyptic number.

161274760920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161274760920 is an abundant number, since it is smaller than the sum of its proper divisors (483824413800).

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

161274760920 is a wasteful number, since it uses less digits than its factorization.

161274760920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922954 (or 4922947 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 161274760920 in words is "one hundred sixty-one billion, two hundred seventy-four million, seven hundred sixty thousand, nine hundred twenty".