161592372 has 36 divisors (see below), whose sum is σ = 409273956. Its totient is φ = 53758080.

The previous prime is 161592371. The next prime is 161592377. The reversal of 161592372 is 273295161.

161592372 is a `hidden beast` number, since 1 + 61 + 592 + 3 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 126023076 + 35569296 = 11226^2 + 5964^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161592372² = 52224189377172768, 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 (161592371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15328 + ... + 23624.

It is an arithmetic number, because the mean of its divisors is an integer number (11368721).

Almost surely, 2^161592372 is an apocalyptic number.

161592372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161592372 is an abundant number, since it is smaller than the sum of its proper divisors (247681584).

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

161592372 is a wasteful number, since it uses less digits than its factorization.

With its successor (161592373) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (8843).

161592372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8848 (or 8843 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 161592372 is about 12711.8988353432. The cubic root of 161592372 is about 544.6785658954.

The spelling of 161592372 in words is "one hundred sixty-one million, five hundred ninety-two thousand, three hundred seventy-two".