72557511671 has 2 divisors, whose sum is σ = 72557511672. Its totient is φ = 72557511670.

The previous prime is 72557511629. The next prime is 72557511713. The reversal of 72557511671 is 17611575527.

It is a balanced prime because it is at equal distance from previous prime (72557511629) and next prime (72557511713).

It is a cyclic number.

It is not a de Polignac number, because 72557511671 - 2²⁶ = 72490402807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72557511071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278755835 + 36278755836.

It is an arithmetic number, because the mean of its divisors is an integer number (36278755836).

Almost surely, 2^72557511671 is an apocalyptic number.

72557511671 is a deficient number, since it is larger than the sum of its proper divisors (1).

72557511671 is an equidigital number, since it uses as much as digits as its factorization.

72557511671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 514500, while the sum is 47.

The spelling of 72557511671 in words is "seventy-two billion, five hundred fifty-seven million, five hundred eleven thousand, six hundred seventy-one".