72149350731 has 16 divisors (see below), whose sum is σ = 101293635840. Its totient is φ = 45553885920.

The previous prime is 72149350729. The next prime is 72149350733. The reversal of 72149350731 is 13705394127.

It is an interprime number because it is at equal distance from previous prime (72149350729) and next prime (72149350733).

It is not a de Polignac number, because 72149350731 - 2¹ = 72149350729 is a prime.

It is a super-2 number, since 2×72149350731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72149350733) 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, 9135 + ... + 379976.

It is an arithmetic number, because the mean of its divisors is an integer number (6330852240).

Almost surely, 2^72149350731 is an apocalyptic number.

72149350731 is a deficient number, since it is larger than the sum of its proper divisors (29144285109).

72149350731 is a wasteful number, since it uses less digits than its factorization.

72149350731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392386.

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 72149350731 in words is "seventy-two billion, one hundred forty-nine million, three hundred fifty thousand, seven hundred thirty-one".