55651823172864 has 432 divisors, whose sum is σ = 169634996241984. Its totient is φ = 18190448640000.

The previous prime is 55651823172851. The next prime is 55651823172991. The reversal of 55651823172864 is 46827132815655.

55651823172864 is a `hidden beast` number, since 5 + 5 + 6 + 518 + 2 + 31 + 7 + 2 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

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, 7949121364 + ... + 7949128364.

It is an arithmetic number, because the mean of its divisors is an integer number (392673602412).

Almost surely, 2^{55651823172864} is an apocalyptic number.

55651823172864 is a gapful number since it is divisible by the number (54) 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 55651823172864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84817498120992).

55651823172864 is an abundant number, since it is smaller than the sum of its proper divisors (113983173069120).

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

55651823172864 is an equidigital number, since it uses as much as digits as its factorization.

55651823172864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496 (or 9470 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 55651823172864 in words is "fifty-five trillion, six hundred fifty-one billion, eight hundred twenty-three million, one hundred seventy-two thousand, eight hundred sixty-four".