55188317700 has 216 divisors, whose sum is σ = 184398614400. Its totient is φ = 13765489920.

The previous prime is 55188317683. The next prime is 55188317711. The reversal of 55188317700 is 771388155.

55188317700 is a `hidden beast` number, since 551 + 8 + 83 + 17 + 7 + 0 + 0 = 666.

55188317700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55188317700² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1330474 + ... + 1371326.

Almost surely, 2^55188317700 is an apocalyptic number.

55188317700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55188317700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92199307200).

55188317700 is an abundant number, since it is smaller than the sum of its proper divisors (129210296700).

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

55188317700 is a wasteful number, since it uses less digits than its factorization.

55188317700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40971 (or 40961 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 45.

The spelling of 55188317700 in words is "fifty-five billion, one hundred eighty-eight million, three hundred seventeen thousand, seven hundred".