161322562456 has 32 divisors (see below), whose sum is σ = 331953914880. Its totient is φ = 72889338400.

The previous prime is 161322562447. The next prime is 161322562469. The reversal of 161322562456 is 654265223161.

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, 5473960 + ... + 5503351.

It is an arithmetic number, because the mean of its divisors is an integer number (10373559840).

Almost surely, 2^161322562456 is an apocalyptic number.

It is an amenable number.

161322562456 is an abundant number, since it is smaller than the sum of its proper divisors (170631352424).

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

161322562456 is a wasteful number, since it uses less digits than its factorization.

161322562456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10977495 (or 10977491 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 161322562456 in words is "one hundred sixty-one billion, three hundred twenty-two million, five hundred sixty-two thousand, four hundred fifty-six".