55998138168 has 192 divisors, whose sum is σ = 179807846400. Its totient is φ = 15411202560.

The previous prime is 55998138061. The next prime is 55998138173. The reversal of 55998138168 is 86183189955.

55998138168 is a `hidden beast` number, since 5 + 599 + 8 + 1 + 38 + 1 + 6 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1615305 + ... + 1649607.

It is an arithmetic number, because the mean of its divisors is an integer number (936499200).

Almost surely, 2^55998138168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55998138168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89903923200).

55998138168 is an abundant number, since it is smaller than the sum of its proper divisors (123809708232).

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

55998138168 is a wasteful number, since it uses less digits than its factorization.

55998138168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34442 (or 34435 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

The spelling of 55998138168 in words is "fifty-five billion, nine hundred ninety-eight million, one hundred thirty-eight thousand, one hundred sixty-eight".