55578759138 has 96 divisors (see below), whose sum is σ = 143321398272. Its totient is φ = 15231283200.

The previous prime is 55578759133. The next prime is 55578759161. The reversal of 55578759138 is 83195787555.

55578759138 is a `hidden beast` number, since 5 + 5 + 5 + 7 + 8 + 7 + 591 + 38 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55578759133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 378418 + ... + 504338.

It is an arithmetic number, because the mean of its divisors is an integer number (1492931232).

Almost surely, 2^55578759138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55578759138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71660699136).

55578759138 is an abundant number, since it is smaller than the sum of its proper divisors (87742639134).

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

55578759138 is a wasteful number, since it uses less digits than its factorization.

55578759138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126080 (or 126077 counting only the distinct ones).

The product of its digits is 52920000, while the sum is 63.

The spelling of 55578759138 in words is "fifty-five billion, five hundred seventy-eight million, seven hundred fifty-nine thousand, one hundred thirty-eight".