71715837540 has 24 divisors (see below), whose sum is σ = 200804345280. Its totient is φ = 19124223328.

The previous prime is 71715837533. The next prime is 71715837617. The reversal of 71715837540 is 4573851717.

It is a super-2 number, since 2×71715837540² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71715837540.

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, 597631920 + ... + 597632039.

It is an arithmetic number, because the mean of its divisors is an integer number (8366847720).

Almost surely, 2^71715837540 is an apocalyptic number.

It is an amenable number.

71715837540 is an abundant number, since it is smaller than the sum of its proper divisors (129088507740).

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

71715837540 is a wasteful number, since it uses less digits than its factorization.

71715837540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195263971 (or 1195263969 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 71715837540 in words is "seventy-one billion, seven hundred fifteen million, eight hundred thirty-seven thousand, five hundred forty".