68509937572 has 12 divisors (see below), whose sum is σ = 126202516720. Its totient is φ = 32452075656.

The previous prime is 68509937537. The next prime is 68509937579. The reversal of 68509937572 is 27573990586.

It is a super-2 number, since 2×68509937572² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68509937572.

It is not an unprimeable number, because it can be changed into a prime (68509937579) 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, 450723198 + ... + 450723349.

Almost surely, 2^68509937572 is an apocalyptic number.

It is an amenable number.

68509937572 is a deficient number, since it is larger than the sum of its proper divisors (57692579148).

68509937572 is a wasteful number, since it uses less digits than its factorization.

68509937572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901446570 (or 901446568 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 61.

The spelling of 68509937572 in words is "sixty-eight billion, five hundred nine million, nine hundred thirty-seven thousand, five hundred seventy-two".