55440297898560 has 336 divisors, whose sum is σ = 199085018745600. Its totient is φ = 14134004797440.

The previous prime is 55440297898549. The next prime is 55440297898571. The reversal of 55440297898560 is 6589879204455.

55440297898560 is a `hidden beast` number, since 5 + 5 + 4 + 402 + 9 + 7 + 89 + 85 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (55440297898549) and next prime (55440297898571).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 128887045 + ... + 129316475.

Almost surely, 2^{55440297898560} 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 55440297898560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99542509372800).

55440297898560 is an abundant number, since it is smaller than the sum of its proper divisors (143644720847040).

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

55440297898560 is a wasteful number, since it uses less digits than its factorization.

55440297898560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431426 (or 431413 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 72.

The spelling of 55440297898560 in words is "fifty-five trillion, four hundred forty billion, two hundred ninety-seven million, eight hundred ninety-eight thousand, five hundred sixty".