556557758377 has 2 divisors, whose sum is σ = 556557758378. Its totient is φ = 556557758376.

The previous prime is 556557758371. The next prime is 556557758399. The reversal of 556557758377 is 773857755655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515436407721 + 41121350656 = 717939^2 + 202784^2 .

It is a cyclic number.

It is not a de Polignac number, because 556557758377 - 2⁷ = 556557758249 is a prime.

It is a super-2 number, since 2×556557758377² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556557758371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278278879188 + 278278879189.

It is an arithmetic number, because the mean of its divisors is an integer number (278278879189).

Almost surely, 2^556557758377 is an apocalyptic number.

It is an amenable number.

556557758377 is a deficient number, since it is larger than the sum of its proper divisors (1).

556557758377 is an equidigital number, since it uses as much as digits as its factorization.

556557758377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080450000, while the sum is 70.

The spelling of 556557758377 in words is "five hundred fifty-six billion, five hundred fifty-seven million, seven hundred fifty-eight thousand, three hundred seventy-seven".