71464640677 has 2 divisors, whose sum is σ = 71464640678. Its totient is φ = 71464640676.

The previous prime is 71464640651. The next prime is 71464640683. The reversal of 71464640677 is 77604646417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51332152356 + 20132488321 = 226566^2 + 141889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71464640677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71464620677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35732320338 + 35732320339.

It is an arithmetic number, because the mean of its divisors is an integer number (35732320339).

Almost surely, 2^71464640677 is an apocalyptic number.

It is an amenable number.

71464640677 is a deficient number, since it is larger than the sum of its proper divisors (1).

71464640677 is an equidigital number, since it uses as much as digits as its factorization.

71464640677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 52.

The spelling of 71464640677 in words is "seventy-one billion, four hundred sixty-four million, six hundred forty thousand, six hundred seventy-seven".