161632435808 has 24 divisors (see below), whose sum is σ = 325614183048. Its totient is φ = 78936770304.

The previous prime is 161632435759. The next prime is 161632435819. The reversal of 161632435808 is 808534236161.

It is a super-2 number, since 2×161632435808² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58731341 + ... + 58734092.

It is an arithmetic number, because the mean of its divisors is an integer number (13567257627).

Almost surely, 2^161632435808 is an apocalyptic number.

It is an amenable number.

161632435808 is an abundant number, since it is smaller than the sum of its proper divisors (163981747240).

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

161632435808 is a wasteful number, since it uses less digits than its factorization.

161632435808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117465486 (or 117465478 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 161632435808 in words is "one hundred sixty-one billion, six hundred thirty-two million, four hundred thirty-five thousand, eight hundred eight".