161115372 has 72 divisors (see below), whose sum is σ = 459169200. Its totient is φ = 48818880.

The previous prime is 161115349. The next prime is 161115377. The reversal of 161115372 is 273511161.

161115372 is a `hidden beast` number, since 1 + 611 + 15 + 37 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (161115377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6904 + ... + 19232.

It is an arithmetic number, because the mean of its divisors is an integer number (6377350).

Almost surely, 2^161115372 is an apocalyptic number.

161115372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161115372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229584600).

161115372 is an abundant number, since it is smaller than the sum of its proper divisors (298053828).

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

161115372 is a wasteful number, since it uses less digits than its factorization.

161115372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12364 (or 12345 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 161115372 is about 12693.1230199664. The cubic root of 161115372 is about 544.1420972152.

The spelling of 161115372 in words is "one hundred sixty-one million, one hundred fifteen thousand, three hundred seventy-two".