71056637930 has 16 divisors (see below), whose sum is σ = 131021508744. Its totient is φ = 27729419520.

The previous prime is 71056637929. The next prime is 71056637957. The reversal of 71056637930 is 3973665017.

It can be written as a sum of positive squares in 4 ways, for example, as 33517187929 + 37539450001 = 183077^2 + 193751^2 .

It is a super-2 number, since 2×71056637930² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 86654027 + ... + 86654846.

Almost surely, 2^71056637930 is an apocalyptic number.

71056637930 is a deficient number, since it is larger than the sum of its proper divisors (59964870814).

71056637930 is a wasteful number, since it uses less digits than its factorization.

71056637930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173308921.

The product of its (nonzero) digits is 714420, while the sum is 47.

The spelling of 71056637930 in words is "seventy-one billion, fifty-six million, six hundred thirty-seven thousand, nine hundred thirty".