55258721964432 has 320 divisors, whose sum is σ = 182718576691200. Its totient is φ = 15662297064960.

The previous prime is 55258721964421. The next prime is 55258721964451. The reversal of 55258721964432 is 23446912785255.

55258721964432 is a `hidden beast` number, since 5 + 5 + 2 + 5 + 8 + 7 + 2 + 196 + 4 + 432 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55258721964432.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1231589263 + ... + 1231634129.

It is an arithmetic number, because the mean of its divisors is an integer number (570995552160).

Almost surely, 2^{55258721964432} 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 55258721964432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91359288345600).

55258721964432 is an abundant number, since it is smaller than the sum of its proper divisors (127459854726768).

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

55258721964432 is a wasteful number, since it uses less digits than its factorization.

55258721964432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48131 (or 48119 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 63.

The spelling of 55258721964432 in words is "fifty-five trillion, two hundred fifty-eight billion, seven hundred twenty-one million, nine hundred sixty-four thousand, four hundred thirty-two".