71705516556 has 12 divisors (see below), whose sum is σ = 167312871992. Its totient is φ = 23901838848.

The previous prime is 71705516539. The next prime is 71705516557. The reversal of 71705516556 is 65561550717.

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

It is a super-2 number, since 2×71705516556² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71705516557) 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, 2987729845 + ... + 2987729868.

Almost surely, 2^71705516556 is an apocalyptic number.

It is an amenable number.

71705516556 is an abundant number, since it is smaller than the sum of its proper divisors (95607355436).

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

71705516556 is a wasteful number, since it uses less digits than its factorization.

71705516556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975459720 (or 5975459718 counting only the distinct ones).

The product of its (nonzero) digits is 1102500, while the sum is 48.

The spelling of 71705516556 in words is "seventy-one billion, seven hundred five million, five hundred sixteen thousand, five hundred fifty-six".