72739706359321 has 16 divisors (see below), whose sum is σ = 77384072102400. Its totient is φ = 68177425171968.

The previous prime is 72739706359291. The next prime is 72739706359343. The reversal of 72739706359321 is 12395360793727.

It is a cyclic number.

It is not a de Polignac number, because 72739706359321 - 2³¹ = 72737558875673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72739706359121) 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, 1422505 + ... + 12145078.

It is an arithmetic number, because the mean of its divisors is an integer number (4836504506400).

Almost surely, 2^{72739706359321} is an apocalyptic number.

It is an amenable number.

72739706359321 is a deficient number, since it is larger than the sum of its proper divisors (4644365743079).

72739706359321 is a wasteful number, since it uses less digits than its factorization.

72739706359321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13570608.

The product of its (nonzero) digits is 90016920, while the sum is 64.

The spelling of 72739706359321 in words is "seventy-two trillion, seven hundred thirty-nine billion, seven hundred six million, three hundred fifty-nine thousand, three hundred twenty-one".