161682372 has 48 divisors (see below), whose sum is σ = 420168000. Its totient is φ = 53766720.

The previous prime is 161682349. The next prime is 161682373. The reversal of 161682372 is 273286161.

161682372 is a `hidden beast` number, since 1 + 616 + 8 + 2 + 37 + 2 = 666.

It is a super-2 number, since 2×161682372² = 52282378831092768, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (161682373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51504 + ... + 54552.

It is an arithmetic number, because the mean of its divisors is an integer number (8753500).

Almost surely, 2^161682372 is an apocalyptic number.

161682372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161682372 is an abundant number, since it is smaller than the sum of its proper divisors (258485628).

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

161682372 is a wasteful number, since it uses less digits than its factorization.

161682372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553 (or 3545 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 161682372 is about 12715.4383329872. The cubic root of 161682372 is about 544.7796679714.

The spelling of 161682372 in words is "one hundred sixty-one million, six hundred eighty-two thousand, three hundred seventy-two".