55051988544 has 168 divisors, whose sum is σ = 180461643648. Its totient is φ = 15718440960.

The previous prime is 55051988533. The next prime is 55051988549. The reversal of 55051988544 is 44588915055.

55051988544 is a `hidden beast` number, since 5 + 5 + 0 + 5 + 1 + 98 + 8 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (55051988549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7378864 + ... + 7386320.

Almost surely, 2^55051988544 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 55051988544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90230821824).

55051988544 is an abundant number, since it is smaller than the sum of its proper divisors (125409655104).

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

55051988544 is a wasteful number, since it uses less digits than its factorization.

55051988544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313 (or 9300 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 55051988544 in words is "fifty-five billion, fifty-one million, nine hundred eighty-eight thousand, five hundred forty-four".