71637329651 has 2 divisors, whose sum is σ = 71637329652. Its totient is φ = 71637329650.

The previous prime is 71637329579. The next prime is 71637329669. The reversal of 71637329651 is 15692373617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71637329651 - 2³⁰ = 70563587827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71637329651.

It is not a weakly prime, because it can be changed into another prime (71637329851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35818664825 + 35818664826.

It is an arithmetic number, because the mean of its divisors is an integer number (35818664826).

Almost surely, 2^71637329651 is an apocalyptic number.

71637329651 is a deficient number, since it is larger than the sum of its proper divisors (1).

71637329651 is an equidigital number, since it uses as much as digits as its factorization.

71637329651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 50.

The spelling of 71637329651 in words is "seventy-one billion, six hundred thirty-seven million, three hundred twenty-nine thousand, six hundred fifty-one".