55775557557 has 8 divisors (see below), whose sum is σ = 82630455680. Its totient is φ = 37183705020.

The previous prime is 55775557553. The next prime is 55775557637. The reversal of 55775557557 is 75575557755.

55775557557 is a `hidden beast` number, since 5 + 5 + 7 + 7 + 5 + 5 + 575 + 57 = 666.

It is not a de Polignac number, because 55775557557 - 2² = 55775557553 is a prime.

It is a super-2 number, since 2×55775557557² (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 = 55775557494 and 55775557503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55775557553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032880669 + ... + 1032880722.

It is an arithmetic number, because the mean of its divisors is an integer number (10328806960).

Almost surely, 2^55775557557 is an apocalyptic number.

It is an amenable number.

55775557557 is a deficient number, since it is larger than the sum of its proper divisors (26854898123).

55775557557 is a wasteful number, since it uses less digits than its factorization.

55775557557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065761400 (or 2065761394 counting only the distinct ones).

The product of its digits is 187578125, while the sum is 63.

The spelling of 55775557557 in words is "fifty-five billion, seven hundred seventy-five million, five hundred fifty-seven thousand, five hundred fifty-seven".