161671024128 has 80 divisors (see below), whose sum is σ = 439865775360. Its totient is φ = 52743714816.

The previous prime is 161671024049. The next prime is 161671024139. The reversal of 161671024128 is 821420176161.

It is a super-2 number, since 2×161671024128² (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 7 ways as a sum of consecutive naturals, for example, 1047538 + ... + 1191921.

It is an arithmetic number, because the mean of its divisors is an integer number (5498322192).

Almost surely, 2^161671024128 is an apocalyptic number.

It is an amenable number.

161671024128 is an abundant number, since it is smaller than the sum of its proper divisors (278194751232).

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

161671024128 is an equidigital number, since it uses as much as digits as its factorization.

161671024128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239527 (or 2239511 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 161671024128 in words is "one hundred sixty-one billion, six hundred seventy-one million, twenty-four thousand, one hundred twenty-eight".