72721394016268 has 24 divisors (see below), whose sum is σ = 128403006449760. Its totient is φ = 36034892678400.

The previous prime is 72721394016259. The next prime is 72721394016347. The reversal of 72721394016268 is 86261049312727.

It is a super-2 number, since 2×72721394016268² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4941303 + ... + 13033006.

It is an arithmetic number, because the mean of its divisors is an integer number (5350125268740).

Almost surely, 2^{72721394016268} is an apocalyptic number.

It is an amenable number.

72721394016268 is a deficient number, since it is larger than the sum of its proper divisors (55681612433492).

72721394016268 is a wasteful number, since it uses less digits than its factorization.

72721394016268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17983377 (or 17983375 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 72721394016268 in words is "seventy-two trillion, seven hundred twenty-one billion, three hundred ninety-four million, sixteen thousand, two hundred sixty-eight".