161162776776 has 32 divisors (see below), whose sum is σ = 404512164000. Its totient is φ = 53506896000.

The previous prime is 161162776669. The next prime is 161162776787. The reversal of 161162776776 is 677677261161.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 13370701 + ... + 13382748.

It is an arithmetic number, because the mean of its divisors is an integer number (12641005125).

Almost surely, 2^161162776776 is an apocalyptic number.

It is an amenable number.

161162776776 is an abundant number, since it is smaller than the sum of its proper divisors (243349387224).

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

161162776776 is a wasteful number, since it uses less digits than its factorization.

161162776776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26753709 (or 26753705 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 57.

The spelling of 161162776776 in words is "one hundred sixty-one billion, one hundred sixty-two million, seven hundred seventy-six thousand, seven hundred seventy-six".