55566789138 has 24 divisors (see below), whose sum is σ = 137593954368. Its totient is φ = 15876225432.

The previous prime is 55566789127. The next prime is 55566789167. The reversal of 55566789138 is 83198766555.

55566789138 is a `hidden beast` number, since 5 + 556 + 6 + 78 + 9 + 1 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220503006 + ... + 220503257.

It is an arithmetic number, because the mean of its divisors is an integer number (5733081432).

Almost surely, 2^55566789138 is an apocalyptic number.

55566789138 is an abundant number, since it is smaller than the sum of its proper divisors (82027165230).

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

55566789138 is a wasteful number, since it uses less digits than its factorization.

55566789138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441006278 (or 441006275 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 63.

The spelling of 55566789138 in words is "fifty-five billion, five hundred sixty-six million, seven hundred eighty-nine thousand, one hundred thirty-eight".