71651988692 has 6 divisors (see below), whose sum is σ = 125390980218. Its totient is φ = 35825994344.

The previous prime is 71651988691. The next prime is 71651988703. The reversal of 71651988692 is 29688915617.

It can be written as a sum of positive squares in only one way, i.e., 69482851216 + 2169137476 = 263596^2 + 46574^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71651988691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8956498583 + ... + 8956498590.

It is an arithmetic number, because the mean of its divisors is an integer number (20898496703).

Almost surely, 2^71651988692 is an apocalyptic number.

It is an amenable number.

71651988692 is a deficient number, since it is larger than the sum of its proper divisors (53738991526).

71651988692 is a wasteful number, since it uses less digits than its factorization.

71651988692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17912997177 (or 17912997175 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 62.

The spelling of 71651988692 in words is "seventy-one billion, six hundred fifty-one million, nine hundred eighty-eight thousand, six hundred ninety-two".