55561001055 has 16 divisors (see below), whose sum is σ = 101597259264. Its totient is φ = 25399314720.

The previous prime is 55561001039. The next prime is 55561001071. The reversal of 55561001055 is 55010016555.

It is an interprime number because it is at equal distance from previous prime (55561001039) and next prime (55561001071).

It is not a de Polignac number, because 55561001055 - 2⁴ = 55561001039 is a prime.

It is a super-2 number, since 2×55561001055² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264576091 + ... + 264576300.

It is an arithmetic number, because the mean of its divisors is an integer number (6349828704).

Almost surely, 2^55561001055 is an apocalyptic number.

55561001055 is a deficient number, since it is larger than the sum of its proper divisors (46036258209).

55561001055 is a wasteful number, since it uses less digits than its factorization.

55561001055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529152406.

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 55561001055 in words is "fifty-five billion, five hundred sixty-one million, one thousand, fifty-five".