71564788371 has 12 divisors (see below), whose sum is σ = 100706130312. Its totient is φ = 45198813024.

The previous prime is 71564788349. The next prime is 71564788439. The reversal of 71564788371 is 17388746517.

It is not a de Polignac number, because 71564788371 - 2⁶ = 71564788307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (71564788171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33038986 + ... + 33041151.

It is an arithmetic number, because the mean of its divisors is an integer number (8392177526).

Almost surely, 2^71564788371 is an apocalyptic number.

71564788371 is a deficient number, since it is larger than the sum of its proper divisors (29141341941).

71564788371 is a wasteful number, since it uses less digits than its factorization.

71564788371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66080178 (or 66080159 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 57.

The spelling of 71564788371 in words is "seventy-one billion, five hundred sixty-four million, seven hundred eighty-eight thousand, three hundred seventy-one".