55555586358720 has 448 divisors, whose sum is σ = 213595699645440. Its totient is φ = 11943043596288.

The previous prime is 55555586358709. The next prime is 55555586358761. The reversal of 55555586358720 is 2785368555555.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×55555586358720² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 162850086 + ... + 163190874.

It is an arithmetic number, because the mean of its divisors is an integer number (476776115280).

Almost surely, 2^{55555586358720} 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 55555586358720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106797849822720).

55555586358720 is an abundant number, since it is smaller than the sum of its proper divisors (158040113286720).

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

55555586358720 is a wasteful number, since it uses less digits than its factorization.

55555586358720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342260 (or 342250 counting only the distinct ones).

The product of its (nonzero) digits is 1260000000, while the sum is 69.

The spelling of 55555586358720 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred eighty-six million, three hundred fifty-eight thousand, seven hundred twenty".