55388196864 has 1248 divisors, whose sum is σ = 228981043200. Its totient is φ = 12421693440.

The previous prime is 55388196811. The next prime is 55388196869. The reversal of 55388196864 is 46869188355.

55388196864 is a `hidden beast` number, since 5 + 5 + 388 + 196 + 8 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (1248).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55388196869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 701116377 + ... + 701116455.

It is an arithmetic number, because the mean of its divisors is an integer number (183478400).

Almost surely, 2^55388196864 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 55388196864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114490521600).

55388196864 is an abundant number, since it is smaller than the sum of its proper divisors (173592846336).

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

55388196864 is a wasteful number, since it uses less digits than its factorization.

55388196864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 134 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

It can be divided in two parts, 55388 and 196864, that added together give a palindrome (252252).

The spelling of 55388196864 in words is "fifty-five billion, three hundred eighty-eight million, one hundred ninety-six thousand, eight hundred sixty-four".