71550679640 has 64 divisors (see below), whose sum is σ = 181289733120. Its totient is φ = 25179120000.

The previous prime is 71550679589. The next prime is 71550679657. The reversal of 71550679640 is 4697605517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2609186 + ... + 2636465.

It is an arithmetic number, because the mean of its divisors is an integer number (2832652080).

Almost surely, 2^71550679640 is an apocalyptic number.

It is an amenable number.

71550679640 is an abundant number, since it is smaller than the sum of its proper divisors (109739053480).

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

71550679640 is a wasteful number, since it uses less digits than its factorization.

71550679640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245704 (or 5245700 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 71550679640 in words is "seventy-one billion, five hundred fifty million, six hundred seventy-nine thousand, six hundred forty".