556172837893 has 2 divisors, whose sum is σ = 556172837894. Its totient is φ = 556172837892.

The previous prime is 556172837863. The next prime is 556172837903. The reversal of 556172837893 is 398738271655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446574100644 + 109598737249 = 668262^2 + 331057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556172837893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556172837863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278086418946 + 278086418947.

It is an arithmetic number, because the mean of its divisors is an integer number (278086418947).

Almost surely, 2^556172837893 is an apocalyptic number.

It is an amenable number.

556172837893 is a deficient number, since it is larger than the sum of its proper divisors (1).

556172837893 is an equidigital number, since it uses as much as digits as its factorization.

556172837893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 64.

The spelling of 556172837893 in words is "five hundred fifty-six billion, one hundred seventy-two million, eight hundred thirty-seven thousand, eight hundred ninety-three".