161515015274 has 16 divisors (see below), whose sum is σ = 242792633088. Its totient is φ = 80584244832.

The previous prime is 161515015247. The next prime is 161515015309. The reversal of 161515015274 is 472510515161.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3191879 + ... + 3242085.

It is an arithmetic number, because the mean of its divisors is an integer number (15174539568).

Almost surely, 2^161515015274 is an apocalyptic number.

161515015274 is a deficient number, since it is larger than the sum of its proper divisors (81277617814).

161515015274 is a wasteful number, since it uses less digits than its factorization.

161515015274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53629.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 161515015274 in words is "one hundred sixty-one billion, five hundred fifteen million, fifteen thousand, two hundred seventy-four".