71559994984 has 16 divisors (see below), whose sum is σ = 134519919300. Its totient is φ = 35688016512.

The previous prime is 71559994981. The next prime is 71559994993. The reversal of 71559994984 is 48949995517.

It can be written as a sum of positive squares in 2 ways, for example, as 71529502500 + 30492484 = 267450^2 + 5522^2 .

It is a super-2 number, since 2×71559994984² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71559994981) 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, 11494317 + ... + 11500540.

Almost surely, 2^71559994984 is an apocalyptic number.

It is an amenable number.

71559994984 is a deficient number, since it is larger than the sum of its proper divisors (62959924316).

71559994984 is a wasteful number, since it uses less digits than its factorization.

71559994984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22995252 (or 22995248 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 70.

The spelling of 71559994984 in words is "seventy-one billion, five hundred fifty-nine million, nine hundred ninety-four thousand, nine hundred eighty-four".