161569406604 has 48 divisors (see below), whose sum is σ = 380983758848. Its totient is φ = 53288964288.

The previous prime is 161569406591. The next prime is 161569406611. The reversal of 161569406604 is 406604965161.

It is a super-2 number, since 2×161569406604² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426339 + ... + 710565.

Almost surely, 2^161569406604 is an apocalyptic number.

It is an amenable number.

161569406604 is an abundant number, since it is smaller than the sum of its proper divisors (219414352244).

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

161569406604 is a wasteful number, since it uses less digits than its factorization.

161569406604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284734 (or 284732 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 161569406604 in words is "one hundred sixty-one billion, five hundred sixty-nine million, four hundred six thousand, six hundred four".