72154244232 has 64 divisors (see below), whose sum is σ = 229061097600. Its totient is φ = 20615497920.

The previous prime is 72154244213. The next prime is 72154244237. The reversal of 72154244232 is 23244245127.

72154244232 is a `hidden beast` number, since 72 + 1 + 542 + 4 + 42 + 3 + 2 = 666.

It is a super-2 number, since 2×72154244232² (a number of 23 digits) 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 (72154244237) 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, 23859019 + ... + 23862042.

It is an arithmetic number, because the mean of its divisors is an integer number (3579079650).

Almost surely, 2^72154244232 is an apocalyptic number.

72154244232 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

72154244232 is an abundant number, since it is smaller than the sum of its proper divisors (156906853368).

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

72154244232 is a wasteful number, since it uses less digits than its factorization.

72154244232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47721083 (or 47721073 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

Adding to 72154244232 its reverse (23244245127), we get a palindrome (95398489359).

The spelling of 72154244232 in words is "seventy-two billion, one hundred fifty-four million, two hundred forty-four thousand, two hundred thirty-two".