55616718528 has 672 divisors, whose sum is σ = 202367692800. Its totient is φ = 14892595200.

The previous prime is 55616718511. The next prime is 55616718529. The reversal of 55616718528 is 82581761655.

55616718528 is a `hidden beast` number, since 5 + 5 + 616 + 7 + 18 + 5 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is not an unprimeable number, because it can be changed into a prime (55616718529) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 291186913 + ... + 291187103.

It is an arithmetic number, because the mean of its divisors is an integer number (301142400).

Almost surely, 2^55616718528 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 55616718528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101183846400).

55616718528 is an abundant number, since it is smaller than the sum of its proper divisors (146750974272).

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

55616718528 is a wasteful number, since it uses less digits than its factorization.

55616718528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 403 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 54.

The spelling of 55616718528 in words is "fifty-five billion, six hundred sixteen million, seven hundred eighteen thousand, five hundred twenty-eight".