71639375628 has 12 divisors (see below), whose sum is σ = 167158543160. Its totient is φ = 23879791872.

The previous prime is 71639375627. The next prime is 71639375663. The reversal of 71639375628 is 82657393617.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (71639375627) 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, 2984973973 + ... + 2984973996.

Almost surely, 2^71639375628 is an apocalyptic number.

It is an amenable number.

71639375628 is an abundant number, since it is smaller than the sum of its proper divisors (95519167532).

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

71639375628 is a wasteful number, since it uses less digits than its factorization.

71639375628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969947976 (or 5969947974 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 57.

The spelling of 71639375628 in words is "seventy-one billion, six hundred thirty-nine million, three hundred seventy-five thousand, six hundred twenty-eight".