161315023776 has 24 divisors (see below), whose sum is σ = 423451937664. Its totient is φ = 53771674560.

The previous prime is 161315023763. The next prime is 161315023777. The reversal of 161315023776 is 677320513161.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (161315023777) 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, 840182320 + ... + 840182511.

It is an arithmetic number, because the mean of its divisors is an integer number (17643830736).

Almost surely, 2^161315023776 is an apocalyptic number.

161315023776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161315023776 is an abundant number, since it is smaller than the sum of its proper divisors (262136913888).

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

161315023776 is a wasteful number, since it uses less digits than its factorization.

161315023776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680364844 (or 1680364836 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 161315023776 in words is "one hundred sixty-one billion, three hundred fifteen million, twenty-three thousand, seven hundred seventy-six".