55777555579 has 2 divisors, whose sum is σ = 55777555580. Its totient is φ = 55777555578.

The previous prime is 55777555549. The next prime is 55777555583. The reversal of 55777555579 is 97555577755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55777555579 is a prime.

It is a super-2 number, since 2×55777555579² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55777555549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27888777789 + 27888777790.

It is an arithmetic number, because the mean of its divisors is an integer number (27888777790).

Almost surely, 2^55777555579 is an apocalyptic number.

55777555579 is a deficient number, since it is larger than the sum of its proper divisors (1).

55777555579 is an equidigital number, since it uses as much as digits as its factorization.

55777555579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 337640625, while the sum is 67.

The spelling of 55777555579 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred seventy-nine".