55427742720 has 880 divisors, whose sum is σ = 231454584768. Its totient is φ = 12421693440.

The previous prime is 55427742697. The next prime is 55427742779. The reversal of 55427742720 is 2724772455.

55427742720 is a `hidden beast` number, since 554 + 2 + 7 + 74 + 2 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 177085284 + ... + 177085596.

Almost surely, 2^55427742720 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 55427742720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115727292384).

55427742720 is an abundant number, since it is smaller than the sum of its proper divisors (176026842048).

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

55427742720 is a wasteful number, since it uses less digits than its factorization.

55427742720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 45.

The spelling of 55427742720 in words is "fifty-five billion, four hundred twenty-seven million, seven hundred forty-two thousand, seven hundred twenty".