71637313728 has 56 divisors (see below), whose sum is σ = 195654615040. Its totient is φ = 23108808960.

The previous prime is 71637313703. The next prime is 71637313729. The reversal of 71637313728 is 82731373617.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (71637313729) 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, 6011968 + ... + 6023871.

Almost surely, 2^71637313728 is an apocalyptic number.

It is an amenable number.

71637313728 is an abundant number, since it is smaller than the sum of its proper divisors (124017301312).

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

71637313728 is a wasteful number, since it uses less digits than its factorization.

71637313728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12035885 (or 12035875 counting only the distinct ones).

The product of its digits is 889056, while the sum is 48.

The spelling of 71637313728 in words is "seventy-one billion, six hundred thirty-seven million, three hundred thirteen thousand, seven hundred twenty-eight".