72734784936724 has 6 divisors (see below), whose sum is σ = 127285873639274. Its totient is φ = 36367392468360.

The previous prime is 72734784936719. The next prime is 72734784936743. The reversal of 72734784936724 is 42763948743727.

It can be written as a sum of positive squares in only one way, i.e., 63604899671824 + 9129885264900 = 7975268^2 + 3021570^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091848117087 + ... + 9091848117094.

Almost surely, 2^{72734784936724} is an apocalyptic number.

It is an amenable number.

72734784936724 is a deficient number, since it is larger than the sum of its proper divisors (54551088702550).

72734784936724 is a wasteful number, since it uses less digits than its factorization.

72734784936724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18183696234185 (or 18183696234183 counting only the distinct ones).

The product of its digits is 2389782528, while the sum is 73.

The spelling of 72734784936724 in words is "seventy-two trillion, seven hundred thirty-four billion, seven hundred eighty-four million, nine hundred thirty-six thousand, seven hundred twenty-four".