71857809952 has 12 divisors (see below), whose sum is σ = 141470063406. Its totient is φ = 35928904960.

The previous prime is 71857809913. The next prime is 71857809977. The reversal of 71857809952 is 25990875817.

It can be written as a sum of positive squares in only one way, i.e., 64762106256 + 7095703696 = 254484^2 + 84236^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1122778249 + ... + 1122778312.

Almost surely, 2^71857809952 is an apocalyptic number.

It is an amenable number.

71857809952 is a deficient number, since it is larger than the sum of its proper divisors (69612253454).

71857809952 is a wasteful number, since it uses less digits than its factorization.

71857809952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245556571 (or 2245556563 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 61.

The spelling of 71857809952 in words is "seventy-one billion, eight hundred fifty-seven million, eight hundred nine thousand, nine hundred fifty-two".