161162776775 has 72 divisors (see below), whose sum is σ = 270352300512. Its totient is φ = 92736864000.

The previous prime is 161162776669. The next prime is 161162776787. The reversal of 161162776775 is 577677261161.

It is not a de Polignac number, because 161162776775 - 2⁸ = 161162776519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161162776775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17456 + ... + 568005.

Almost surely, 2^161162776775 is an apocalyptic number.

161162776775 is a deficient number, since it is larger than the sum of its proper divisors (109189523737).

161162776775 is a wasteful number, since it uses less digits than its factorization.

161162776775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585513 (or 585497 counting only the distinct ones).

The product of its digits is 5186160, while the sum is 56.

The spelling of 161162776775 in words is "one hundred sixty-one billion, one hundred sixty-two million, seven hundred seventy-six thousand, seven hundred seventy-five".