71315259640 has 32 divisors (see below), whose sum is σ = 160972012080. Its totient is φ = 28434961152.

The previous prime is 71315259611. The next prime is 71315259679. The reversal of 71315259640 is 4695251317.

It is a super-2 number, since 2×71315259640² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2835534 + ... + 2860573.

Almost surely, 2^71315259640 is an apocalyptic number.

It is an amenable number.

71315259640 is an abundant number, since it is smaller than the sum of its proper divisors (89656752440).

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

71315259640 is a wasteful number, since it uses less digits than its factorization.

71315259640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696431 (or 5696427 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 71315259640 in words is "seventy-one billion, three hundred fifteen million, two hundred fifty-nine thousand, six hundred forty".