71057047631 has 2 divisors, whose sum is σ = 71057047632. Its totient is φ = 71057047630.

The previous prime is 71057047591. The next prime is 71057047657. The reversal of 71057047631 is 13674075017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71057047631 - 2²² = 71052853327 is a prime.

It is a super-2 number, since 2×71057047631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057047681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528523815 + 35528523816.

It is an arithmetic number, because the mean of its divisors is an integer number (35528523816).

Almost surely, 2^71057047631 is an apocalyptic number.

71057047631 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057047631 is an equidigital number, since it uses as much as digits as its factorization.

71057047631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 71057047631 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, six hundred thirty-one".