68731600128 has 72 divisors (see below), whose sum is σ = 182980744128. Its totient is φ = 22903713792.

The previous prime is 68731600073. The next prime is 68731600129. The reversal of 68731600128 is 82100613786.

It is a self number, because there is not a number n which added to its sum of digits gives 68731600128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68731600129) 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, 3016876 + ... + 3039572.

It is an arithmetic number, because the mean of its divisors is an integer number (2541399224).

Almost surely, 2^68731600128 is an apocalyptic number.

It is an amenable number.

68731600128 is an abundant number, since it is smaller than the sum of its proper divisors (114249144000).

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

68731600128 is a wasteful number, since it uses less digits than its factorization.

68731600128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26659 (or 26645 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 68731600128 in words is "sixty-eight billion, seven hundred thirty-one million, six hundred thousand, one hundred twenty-eight".