161274864 has 40 divisors (see below), whose sum is σ = 417308112. Its totient is φ = 53670400.

The previous prime is 161274863. The next prime is 161274877. The reversal of 161274864 is 468472161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161274863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31252 + ... + 36044.

Almost surely, 2^161274864 is an apocalyptic number.

It is an amenable number.

161274864 is an abundant number, since it is smaller than the sum of its proper divisors (256033248).

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

161274864 is a wasteful number, since it uses less digits than its factorization.

161274864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5505 (or 5499 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 161274864 is about 12699.4040805071. The cubic root of 161274864 is about 544.3215911367.

The spelling of 161274864 in words is "one hundred sixty-one million, two hundred seventy-four thousand, eight hundred sixty-four".