72297188688 has 40 divisors (see below), whose sum is σ = 186802517088. Its totient is φ = 24094575232.

The previous prime is 72297188683. The next prime is 72297188693. The reversal of 72297188688 is 88688179227.

It is an interprime number because it is at equal distance from previous prime (72297188683) and next prime (72297188693).

It is a super-2 number, since 2×72297188688² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72297188683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125395 + ... + 400397.

Almost surely, 2^72297188688 is an apocalyptic number.

It is an amenable number.

72297188688 is an abundant number, since it is smaller than the sum of its proper divisors (114505328400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72297188688 is a wasteful number, since it uses less digits than its factorization.

72297188688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280491 (or 280485 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 66.

It can be divided in two parts, 7229 and 7188688, that added together give a palindrome (7195917).

The spelling of 72297188688 in words is "seventy-two billion, two hundred ninety-seven million, one hundred eighty-eight thousand, six hundred eighty-eight".