55887407784 has 128 divisors (see below), whose sum is σ = 167465088000. Its totient is φ = 17167272192.

The previous prime is 55887407777. The next prime is 55887407833. The reversal of 55887407784 is 48770478855.

55887407784 is a `hidden beast` number, since 5 + 588 + 7 + 40 + 7 + 7 + 8 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1688062 + ... + 1720850.

It is an arithmetic number, because the mean of its divisors is an integer number (1308321000).

Almost surely, 2^55887407784 is an apocalyptic number.

55887407784 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 55887407784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83732544000).

55887407784 is an abundant number, since it is smaller than the sum of its proper divisors (111577680216).

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

55887407784 is a wasteful number, since it uses less digits than its factorization.

55887407784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33424 (or 33414 counting only the distinct ones).

The product of its (nonzero) digits is 70246400, while the sum is 63.

The spelling of 55887407784 in words is "fifty-five billion, eight hundred eighty-seven million, four hundred seven thousand, seven hundred eighty-four".