55568778624 has 320 divisors, whose sum is σ = 172262724480. Its totient is φ = 17766604800.

The previous prime is 55568778581. The next prime is 55568778637. The reversal of 55568778624 is 42687786555.

55568778624 is a `hidden beast` number, since 5 + 5 + 568 + 7 + 7 + 8 + 62 + 4 = 666.

Its product of digits (112896000) is a multiple of the sum of its prime divisors (2250).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25929297 + ... + 25931439.

It is an arithmetic number, because the mean of its divisors is an integer number (538321014).

Almost surely, 2^55568778624 is an apocalyptic number.

55568778624 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 55568778624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86131362240).

55568778624 is an abundant number, since it is smaller than the sum of its proper divisors (116693945856).

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

55568778624 is a wasteful number, since it uses less digits than its factorization.

55568778624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271 (or 2250 counting only the distinct ones).

The product of its digits is 112896000, while the sum is 63.

The spelling of 55568778624 in words is "fifty-five billion, five hundred sixty-eight million, seven hundred seventy-eight thousand, six hundred twenty-four".