161807872926 has 32 divisors (see below), whose sum is σ = 378867218688. Its totient is φ = 45103239360.

The previous prime is 161807872921. The next prime is 161807873011. The reversal of 161807872926 is 629278708161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161807872921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46980820 + ... + 46984263.

It is an arithmetic number, because the mean of its divisors is an integer number (11839600584).

Almost surely, 2^161807872926 is an apocalyptic number.

161807872926 is an abundant number, since it is smaller than the sum of its proper divisors (217059345762).

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

161807872926 is a wasteful number, since it uses less digits than its factorization.

161807872926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93965136.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 161807872926 in words is "one hundred sixty-one billion, eight hundred seven million, eight hundred seventy-two thousand, nine hundred twenty-six".