72511128289991 has 2 divisors, whose sum is σ = 72511128289992. Its totient is φ = 72511128289990.

The previous prime is 72511128289937. The next prime is 72511128290017. The reversal of 72511128289991 is 19998282111527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72511128289991 - 2³⁰ = 72510054548167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72511128289921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36255564144995 + 36255564144996.

It is an arithmetic number, because the mean of its divisors is an integer number (36255564144996).

Almost surely, 2^{72511128289991} is an apocalyptic number.

72511128289991 is a deficient number, since it is larger than the sum of its proper divisors (1).

72511128289991 is an equidigital number, since it uses as much as digits as its factorization.

72511128289991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 65.

The spelling of 72511128289991 in words is "seventy-two trillion, five hundred eleven billion, one hundred twenty-eight million, two hundred eighty-nine thousand, nine hundred ninety-one".