161277504 has 56 divisors (see below), whose sum is σ = 451823328. Its totient is φ = 50595840.

The previous prime is 161277499. The next prime is 161277511. The reversal of 161277504 is 405772161.

It is a super-5 number, since 5×161277504⁵ (a number of 42 digits) contains 55555 as substring.

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, 21442 + ... + 27969.

Almost surely, 2^161277504 is an apocalyptic number.

It is an amenable number.

161277504 is an abundant number, since it is smaller than the sum of its proper divisors (290545824).

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

161277504 is a wasteful number, since it uses less digits than its factorization.

161277504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49443 (or 49433 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 161277504 is about 12699.5080219668. The cubic root of 161277504 is about 544.3245612238.

The spelling of 161277504 in words is "one hundred sixty-one million, two hundred seventy-seven thousand, five hundred four".