55598211918 has 48 divisors (see below), whose sum is σ = 132272889840. Its totient is φ = 17442573696.

The previous prime is 55598211869. The next prime is 55598211931. The reversal of 55598211918 is 81911289555.

55598211918 is a `hidden beast` number, since 5 + 5 + 598 + 21 + 19 + 18 = 666.

It is a super-3 number, since 3×55598211918³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3356433 + ... + 3372956.

It is an arithmetic number, because the mean of its divisors is an integer number (2755685205).

Almost surely, 2^55598211918 is an apocalyptic number.

55598211918 is an abundant number, since it is smaller than the sum of its proper divisors (76674677922).

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

55598211918 is a wasteful number, since it uses less digits than its factorization.

55598211918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729423 (or 6729411 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 54.

The spelling of 55598211918 in words is "fifty-five billion, five hundred ninety-eight million, two hundred eleven thousand, nine hundred eighteen".