556172838929 has 2 divisors, whose sum is σ = 556172838930. Its totient is φ = 556172838928.

The previous prime is 556172838829. The next prime is 556172838959. The reversal of 556172838929 is 929838271655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316907073025 + 239265765904 = 562945^2 + 489148^2 .

It is a cyclic number.

It is not a de Polignac number, because 556172838929 - 2¹⁶ = 556172773393 is a prime.

It is not a weakly prime, because it can be changed into another prime (556172838959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278086419464 + 278086419465.

It is an arithmetic number, because the mean of its divisors is an integer number (278086419465).

Almost surely, 2^556172838929 is an apocalyptic number.

It is an amenable number.

556172838929 is a deficient number, since it is larger than the sum of its proper divisors (1).

556172838929 is an equidigital number, since it uses as much as digits as its factorization.

556172838929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 65.

The spelling of 556172838929 in words is "five hundred fifty-six billion, one hundred seventy-two million, eight hundred thirty-eight thousand, nine hundred twenty-nine".