71731775684 has 6 divisors (see below), whose sum is σ = 125530607454. Its totient is φ = 35865887840.

The previous prime is 71731775659. The next prime is 71731775707. The reversal of 71731775684 is 48657713717.

It can be written as a sum of positive squares in only one way, i.e., 58385056900 + 13346718784 = 241630^2 + 115528^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8966471957 + ... + 8966471964.

It is an arithmetic number, because the mean of its divisors is an integer number (20921767909).

Almost surely, 2^71731775684 is an apocalyptic number.

It is an amenable number.

71731775684 is a deficient number, since it is larger than the sum of its proper divisors (53798831770).

71731775684 is a wasteful number, since it uses less digits than its factorization.

71731775684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17932943925 (or 17932943923 counting only the distinct ones).

The product of its digits is 6914880, while the sum is 56.

The spelling of 71731775684 in words is "seventy-one billion, seven hundred thirty-one million, seven hundred seventy-five thousand, six hundred eighty-four".