71440631164 has 48 divisors (see below), whose sum is σ = 143705802688. Its totient is φ = 30441235968.

The previous prime is 71440631149. The next prime is 71440631231. The reversal of 71440631164 is 46113604417.

It is a super-2 number, since 2×71440631164² (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 15 ways as a sum of consecutive naturals, for example, 3469042 + ... + 3489574.

Almost surely, 2^71440631164 is an apocalyptic number.

It is an amenable number.

71440631164 is an abundant number, since it is smaller than the sum of its proper divisors (72265171524).

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

71440631164 is a wasteful number, since it uses less digits than its factorization.

71440631164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21254 (or 21252 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 71440631164 in words is "seventy-one billion, four hundred forty million, six hundred thirty-one thousand, one hundred sixty-four".