55209959424 has 224 divisors, whose sum is σ = 173208939840. Its totient is φ = 17319591936.

The previous prime is 55209959393. The next prime is 55209959471. The reversal of 55209959424 is 42495990255.

55209959424 is a `hidden beast` number, since 5 + 5 + 20 + 9 + 9 + 594 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3752787 + ... + 3767469.

Almost surely, 2^55209959424 is an apocalyptic number.

55209959424 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 55209959424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86604469920).

55209959424 is an abundant number, since it is smaller than the sum of its proper divisors (117998980416).

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

55209959424 is a wasteful number, since it uses less digits than its factorization.

55209959424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14735 (or 14705 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 55209959424 in words is "fifty-five billion, two hundred nine million, nine hundred fifty-nine thousand, four hundred twenty-four".