72099588157531 has 4 divisors (see below), whose sum is σ = 78654096171864. Its totient is φ = 65545080143200.

The previous prime is 72099588157511. The next prime is 72099588157549. The reversal of 72099588157531 is 13575188599027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72099588157531 - 2⁹ = 72099588157019 is a prime.

It is a super-2 number, since 2×72099588157531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72099588157511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277254007150 + ... + 3277254007171.

It is an arithmetic number, because the mean of its divisors is an integer number (19663524042966).

Almost surely, 2^{72099588157531} is an apocalyptic number.

72099588157531 is a deficient number, since it is larger than the sum of its proper divisors (6554508014333).

72099588157531 is a wasteful number, since it uses less digits than its factorization.

72099588157531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6554508014332.

The product of its (nonzero) digits is 190512000, while the sum is 70.

The spelling of 72099588157531 in words is "seventy-two trillion, ninety-nine billion, five hundred eighty-eight million, one hundred fifty-seven thousand, five hundred thirty-one".