72737531450731 has 8 divisors (see below), whose sum is σ = 83128806351360. Its totient is φ = 62346306294888.

The previous prime is 72737531450723. The next prime is 72737531450737. The reversal of 72737531450731 is 13705413573727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72737531450731 - 2³ = 72737531450723 is a prime.

It is a super-2 number, since 2×72737531450731² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72737531450737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9248401 + ... + 15198946.

It is an arithmetic number, because the mean of its divisors is an integer number (10391100793920).

Almost surely, 2^{72737531450731} is an apocalyptic number.

72737531450731 is a deficient number, since it is larger than the sum of its proper divisors (10391274900629).

72737531450731 is a wasteful number, since it uses less digits than its factorization.

72737531450731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24872393.

The product of its (nonzero) digits is 12965400, while the sum is 55.

The spelling of 72737531450731 in words is "seventy-two trillion, seven hundred thirty-seven billion, five hundred thirty-one million, four hundred fifty thousand, seven hundred thirty-one".