161587512 has 48 divisors (see below), whose sum is σ = 456665040. Its totient is φ = 51520128.

The previous prime is 161587511. The next prime is 161587537. The reversal of 161587512 is 215785161.

161587512 is a `hidden beast` number, since 1 + 61 + 5 + 87 + 512 = 666.

It is a super-2 number, since 2×161587512² = 52221048068700288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161587511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47133 + ... + 50444.

It is an arithmetic number, because the mean of its divisors is an integer number (9513855).

Almost surely, 2^161587512 is an apocalyptic number.

161587512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161587512 is an abundant number, since it is smaller than the sum of its proper divisors (295077528).

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

161587512 is a wasteful number, since it uses less digits than its factorization.

161587512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97612 (or 97605 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 161587512 is about 12711.7076744236. The cubic root of 161587512 is about 544.6731053151.

The spelling of 161587512 in words is "one hundred sixty-one million, five hundred eighty-seven thousand, five hundred twelve".