55555555561056 has 96 divisors (see below), whose sum is σ = 164319249024000. Its totient is φ = 18257694295680.

The previous prime is 55555555561039. The next prime is 55555555561091. The reversal of 55555555561056 is 65016555555555.

55555555561056 is a `hidden beast` number, since 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 610 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×55555555561056³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55555555560984 and 55555555561002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452758456 + ... + 452881143.

It is an arithmetic number, because the mean of its divisors is an integer number (1711658844000).

Almost surely, 2^{55555555561056} is an apocalyptic number.

It is an amenable number.

55555555561056 is an abundant number, since it is smaller than the sum of its proper divisors (108763693462944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55555555561056 is a wasteful number, since it uses less digits than its factorization.

55555555561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905639689 (or 905639675 counting only the distinct ones).

The product of its (nonzero) digits is 351562500, while the sum is 63.

The spelling of 55555555561056 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred sixty-one thousand, fifty-six".