161564085624 has 16 divisors (see below), whose sum is σ = 403910214120. Its totient is φ = 53854695200.

The previous prime is 161564085623. The next prime is 161564085671. The reversal of 161564085624 is 426580465161.

It is a super-2 number, since 2×161564085624² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161564085623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365918427 + ... + 3365918474.

Almost surely, 2^161564085624 is an apocalyptic number.

It is an amenable number.

161564085624 is an abundant number, since it is smaller than the sum of its proper divisors (242346128496).

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

161564085624 is a wasteful number, since it uses less digits than its factorization.

161564085624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731836910 (or 6731836906 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 161564085624 in words is "one hundred sixty-one billion, five hundred sixty-four million, eighty-five thousand, six hundred twenty-four".