161740799956 has 48 divisors (see below), whose sum is σ = 297429027840. Its totient is φ = 76852823040.

The previous prime is 161740799923. The next prime is 161740799963. The reversal of 161740799956 is 659997047161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4983076 + ... + 5015428.

It is an arithmetic number, because the mean of its divisors is an integer number (6196438080).

Almost surely, 2^161740799956 is an apocalyptic number.

It is an amenable number.

161740799956 is a deficient number, since it is larger than the sum of its proper divisors (135688227884).

161740799956 is a wasteful number, since it uses less digits than its factorization.

161740799956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33064 (or 33062 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 64.

The spelling of 161740799956 in words is "one hundred sixty-one billion, seven hundred forty million, seven hundred ninety-nine thousand, nine hundred fifty-six".