161207690937 has 16 divisors (see below), whose sum is σ = 219975229440. Its totient is φ = 104965522832.

The previous prime is 161207690929. The next prime is 161207690951. The reversal of 161207690937 is 739096702161.

It is a cyclic number.

It is not a de Polignac number, because 161207690937 - 2³ = 161207690929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161207690937.

It is not an unprimeable number, because it can be changed into a prime (161207890937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1125903 + ... + 1260980.

It is an arithmetic number, because the mean of its divisors is an integer number (13748451840).

Almost surely, 2^161207690937 is an apocalyptic number.

It is an amenable number.

161207690937 is a deficient number, since it is larger than the sum of its proper divisors (58767538503).

161207690937 is a wasteful number, since it uses less digits than its factorization.

161207690937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387412.

The product of its (nonzero) digits is 857304, while the sum is 51.

The spelling of 161207690937 in words is "one hundred sixty-one billion, two hundred seven million, six hundred ninety thousand, nine hundred thirty-seven".