161810125888 has 28 divisors (see below), whose sum is σ = 324209379520. Its totient is φ = 80119573632.

The previous prime is 161810125853. The next prime is 161810125889. The reversal of 161810125888 is 888521018161.

It is not an unprimeable number, because it can be changed into a prime (161810125889) 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, 12266628 + ... + 12279811.

Almost surely, 2^161810125888 is an apocalyptic number.

It is an amenable number.

161810125888 is an abundant number, since it is smaller than the sum of its proper divisors (162399253632).

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

161810125888 is a wasteful number, since it uses less digits than its factorization.

161810125888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24546554 (or 24546544 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 49.

The spelling of 161810125888 in words is "one hundred sixty-one billion, eight hundred ten million, one hundred twenty-five thousand, eight hundred eighty-eight".