55887891696 has 720 divisors, whose sum is σ = 210697943040. Its totient is φ = 13489182720.

The previous prime is 55887891641. The next prime is 55887891707. The reversal of 55887891696 is 69619878855.

55887891696 is a `hidden beast` number, since 558 + 8 + 7 + 8 + 9 + 1 + 69 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 100337050 + ... + 100337606.

It is an arithmetic number, because the mean of its divisors is an integer number (292636032).

Almost surely, 2^55887891696 is an apocalyptic number.

55887891696 is a gapful number since it is divisible by the number (56) 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 55887891696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105348971520).

55887891696 is an abundant number, since it is smaller than the sum of its proper divisors (154810051344).

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

55887891696 is a wasteful number, since it uses less digits than its factorization.

55887891696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 632 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 55887891696 in words is "fifty-five billion, eight hundred eighty-seven million, eight hundred ninety-one thousand, six hundred ninety-six".