55777555559 has 16 divisors (see below), whose sum is σ = 61157800224. Its totient is φ = 50449459200.

The previous prime is 55777555549. The next prime is 55777555579. The reversal of 55777555559 is 95555577755.

It is a cyclic number.

It is not a de Polignac number, because 55777555559 - 2⁸ = 55777555303 is a prime.

It is a super-2 number, since 2×55777555559² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55777555495 and 55777555504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777555549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066837 + ... + 2093649.

It is an arithmetic number, because the mean of its divisors is an integer number (3822362514).

Almost surely, 2^55777555559 is an apocalyptic number.

55777555559 is a deficient number, since it is larger than the sum of its proper divisors (5380244665).

55777555559 is a wasteful number, since it uses less digits than its factorization.

55777555559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27778.

The product of its digits is 241171875, while the sum is 65.

The spelling of 55777555559 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred fifty-nine".