71520717400 has 48 divisors (see below), whose sum is σ = 181402552440. Its totient is φ = 26007532800.

The previous prime is 71520717383. The next prime is 71520717449. The reversal of 71520717400 is 471702517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16252509 + ... + 16256908.

Almost surely, 2^71520717400 is an apocalyptic number.

It is an amenable number.

71520717400 is an abundant number, since it is smaller than the sum of its proper divisors (109881835040).

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

71520717400 is a wasteful number, since it uses less digits than its factorization.

71520717400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32509444 (or 32509435 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 34.

The spelling of 71520717400 in words is "seventy-one billion, five hundred twenty million, seven hundred seventeen thousand, four hundred".