161727975775 has 24 divisors (see below), whose sum is σ = 216246315600. Its totient is φ = 119583187200.

The previous prime is 161727975757. The next prime is 161727975781. The reversal of 161727975775 is 577579727161.

It is not a de Polignac number, because 161727975775 - 2¹⁷ = 161727844703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4132720 + ... + 4171669.

It is an arithmetic number, because the mean of its divisors is an integer number (9010263150).

Almost surely, 2^161727975775 is an apocalyptic number.

161727975775 is a deficient number, since it is larger than the sum of its proper divisors (54518339825).

161727975775 is a wasteful number, since it uses less digits than its factorization.

161727975775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304459 (or 8304454 counting only the distinct ones).

The product of its digits is 45378900, while the sum is 64.

The spelling of 161727975775 in words is "one hundred sixty-one billion, seven hundred twenty-seven million, nine hundred seventy-five thousand, seven hundred seventy-five".