55488615840 has 960 divisors, whose sum is σ = 234482992128. Its totient is φ = 12093235200.

The previous prime is 55488615829. The next prime is 55488615851. The reversal of 55488615840 is 4851688455.

55488615840 is a `hidden beast` number, since 5 + 5 + 488 + 6 + 158 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55488615829) and next prime (55488615851).

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 159 ways as a sum of consecutive naturals, for example, 204754905 + ... + 204755175.

Almost surely, 2^55488615840 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 55488615840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117241496064).

55488615840 is an abundant number, since it is smaller than the sum of its proper divisors (178994376288).

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

55488615840 is a wasteful number, since it uses less digits than its factorization.

55488615840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 6144000, while the sum is 54.

The spelling of 55488615840 in words is "fifty-five billion, four hundred eighty-eight million, six hundred fifteen thousand, eight hundred forty".