55611055557 has 6 divisors (see below), whose sum is σ = 80327080262. Its totient is φ = 37074037032.

The previous prime is 55611055541. The next prime is 55611055573. The reversal of 55611055557 is 75555011655.

It is an interprime number because it is at equal distance from previous prime (55611055541) and next prime (55611055573).

It can be written as a sum of positive squares in only one way, i.e., 55605884481 + 5171076 = 235809^2 + 2274^2 .

It is not a de Polignac number, because 55611055557 - 2⁴ = 55611055541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55611055657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3089503078 + ... + 3089503095.

Almost surely, 2^55611055557 is an apocalyptic number.

It is an amenable number.

55611055557 is a deficient number, since it is larger than the sum of its proper divisors (24716024705).

55611055557 is a wasteful number, since it uses less digits than its factorization.

55611055557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179006179 (or 6179006176 counting only the distinct ones).

The product of its (nonzero) digits is 656250, while the sum is 45.

The spelling of 55611055557 in words is "fifty-five billion, six hundred eleven million, fifty-five thousand, five hundred fifty-seven".