72165023784 has 96 divisors (see below), whose sum is σ = 231070320000. Its totient is φ = 19907588736.

The previous prime is 72165023759. The next prime is 72165023803. The reversal of 72165023784 is 48732056127.

72165023784 is a `hidden beast` number, since 72 + 1 + 6 + 502 + 3 + 78 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2454084 + ... + 2483315.

It is an arithmetic number, because the mean of its divisors is an integer number (2406982500).

Almost surely, 2^72165023784 is an apocalyptic number.

It is an amenable number.

72165023784 is an abundant number, since it is smaller than the sum of its proper divisors (158905296216).

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

72165023784 is a wasteful number, since it uses less digits than its factorization.

72165023784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937447 (or 4937440 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 72165023784 in words is "seventy-two billion, one hundred sixty-five million, twenty-three thousand, seven hundred eighty-four".