161758273756 has 12 divisors (see below), whose sum is σ = 283269427840. Its totient is φ = 80824151520.

The previous prime is 161758273727. The next prime is 161758273757. The reversal of 161758273756 is 657372857161.

It is a self number, because there is not a number n which added to its sum of digits gives 161758273756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161758273757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13739721 + ... + 13751488.

Almost surely, 2^161758273756 is an apocalyptic number.

It is an amenable number.

161758273756 is a deficient number, since it is larger than the sum of its proper divisors (121511154084).

161758273756 is a wasteful number, since it uses less digits than its factorization.

161758273756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27492684 (or 27492682 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 58.

The spelling of 161758273756 in words is "one hundred sixty-one billion, seven hundred fifty-eight million, two hundred seventy-three thousand, seven hundred fifty-six".