55665561156 has 24 divisors (see below), whose sum is σ = 129898896960. Its totient is φ = 18553388832.

The previous prime is 55665561139. The next prime is 55665561187. The reversal of 55665561156 is 65116556655.

It is a junction number, because it is equal to n+sod(n) for n = 55665561099 and 55665561108.

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 7 ways as a sum of consecutive naturals, for example, 92691 + ... + 346298.

It is an arithmetic number, because the mean of its divisors is an integer number (5412454040).

Almost surely, 2^55665561156 is an apocalyptic number.

It is an amenable number.

55665561156 is an abundant number, since it is smaller than the sum of its proper divisors (74233335804).

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

55665561156 is a wasteful number, since it uses less digits than its factorization.

55665561156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449563 (or 449561 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 51.

The spelling of 55665561156 in words is "fifty-five billion, six hundred sixty-five million, five hundred sixty-one thousand, one hundred fifty-six".