72172651536527 has 2 divisors, whose sum is σ = 72172651536528. Its totient is φ = 72172651536526.

The previous prime is 72172651536487. The next prime is 72172651536539. The reversal of 72172651536527 is 72563515627127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72172651536527 - 2²⁴ = 72172634759311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72172651436527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36086325768263 + 36086325768264.

It is an arithmetic number, because the mean of its divisors is an integer number (36086325768264).

Almost surely, 2^{72172651536527} is an apocalyptic number.

72172651536527 is a deficient number, since it is larger than the sum of its proper divisors (1).

72172651536527 is an equidigital number, since it uses as much as digits as its factorization.

72172651536527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044000, while the sum is 59.

The spelling of 72172651536527 in words is "seventy-two trillion, one hundred seventy-two billion, six hundred fifty-one million, five hundred thirty-six thousand, five hundred twenty-seven".