55550531366400 has 720 divisors, whose sum is σ = 213639305338800. Its totient is φ = 12687084748800.

The previous prime is 55550531366389. The next prime is 55550531366419. The reversal of 55550531366400 is 466313505555.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 55550531366400.

It is a congruent number.

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, 2485582426 + ... + 2485604774.

It is an arithmetic number, because the mean of its divisors is an integer number (296721257415).

Almost surely, 2^{55550531366400} is an apocalyptic number.

55550531366400 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 55550531366400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106819652669400).

55550531366400 is an abundant number, since it is smaller than the sum of its proper divisors (158088773972400).

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

55550531366400 is a wasteful number, since it uses less digits than its factorization.

55550531366400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23715 (or 23687 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 48.

The spelling of 55550531366400 in words is "fifty-five trillion, five hundred fifty billion, five hundred thirty-one million, three hundred sixty-six thousand, four hundred".