72265813688 has 32 divisors (see below), whose sum is σ = 139037333760. Its totient is φ = 35196480480.

The previous prime is 72265813681. The next prime is 72265813703. The reversal of 72265813688 is 88631856227.

It is a happy number.

It is a super-2 number, since 2×72265813688² (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 (72265813681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376106 + ... + 534777.

It is an arithmetic number, because the mean of its divisors is an integer number (4344916680).

Almost surely, 2^72265813688 is an apocalyptic number.

It is an amenable number.

72265813688 is a deficient number, since it is larger than the sum of its proper divisors (66771520072).

72265813688 is a wasteful number, since it uses less digits than its factorization.

72265813688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911147 (or 911143 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 72265813688 in words is "seventy-two billion, two hundred sixty-five million, eight hundred thirteen thousand, six hundred eighty-eight".