55777555583 has 2 divisors, whose sum is σ = 55777555584. Its totient is φ = 55777555582.

The previous prime is 55777555579. The next prime is 55777555591. The reversal of 55777555583 is 38555577755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55777555583 - 2² = 55777555579 is a prime.

It is a super-2 number, since 2×55777555583² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55777558583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27888777791 + 27888777792.

It is an arithmetic number, because the mean of its divisors is an integer number (27888777792).

Almost surely, 2^55777555583 is an apocalyptic number.

55777555583 is a deficient number, since it is larger than the sum of its proper divisors (1).

55777555583 is an equidigital number, since it uses as much as digits as its factorization.

55777555583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128625000, while the sum is 62.

The spelling of 55777555583 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred eighty-three".