556172895601 has 2 divisors, whose sum is σ = 556172895602. Its totient is φ = 556172895600.

The previous prime is 556172895587. The next prime is 556172895623. The reversal of 556172895601 is 106598271655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325749855025 + 230423040576 = 570745^2 + 480024^2 .

It is a cyclic number.

It is not a de Polignac number, because 556172895601 - 2⁵ = 556172895569 is a prime.

It is not a weakly prime, because it can be changed into another prime (556172895401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278086447800 + 278086447801.

It is an arithmetic number, because the mean of its divisors is an integer number (278086447801).

Almost surely, 2^556172895601 is an apocalyptic number.

It is an amenable number.

556172895601 is a deficient number, since it is larger than the sum of its proper divisors (1).

556172895601 is an equidigital number, since it uses as much as digits as its factorization.

556172895601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 556172895601 in words is "five hundred fifty-six billion, one hundred seventy-two million, eight hundred ninety-five thousand, six hundred one".