72739828918 has 16 divisors (see below), whose sum is σ = 109209698496. Its totient is φ = 36336616200.

The previous prime is 72739828913. The next prime is 72739828933. The reversal of 72739828918 is 81982893727.

It is a super-2 number, since 2×72739828918² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72739828918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72739828913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17953993 + ... + 17958043.

It is an arithmetic number, because the mean of its divisors is an integer number (6825606156).

Almost surely, 2^72739828918 is an apocalyptic number.

72739828918 is a deficient number, since it is larger than the sum of its proper divisors (36469869578).

72739828918 is a wasteful number, since it uses less digits than its factorization.

72739828918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10059.

The product of its digits is 24385536, while the sum is 64.

The spelling of 72739828918 in words is "seventy-two billion, seven hundred thirty-nine million, eight hundred twenty-eight thousand, nine hundred eighteen".