55887032889 has 20 divisors (see below), whose sum is σ = 84629214516. Its totient is φ = 36747634176.

The previous prime is 55887032869. The next prime is 55887032897. The reversal of 55887032889 is 98823078855.

55887032889 is a `hidden beast` number, since 558 + 8 + 70 + 3 + 2 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33011982864 + 22875050025 = 181692^2 + 151245^2 .

It is not a de Polignac number, because 55887032889 - 2¹⁷ = 55886901817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55887032819) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4719864 + ... + 4731689.

Almost surely, 2^55887032889 is an apocalyptic number.

It is an amenable number.

55887032889 is a deficient number, since it is larger than the sum of its proper divisors (28742181627).

55887032889 is an equidigital number, since it uses as much as digits as its factorization.

55887032889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9451638 (or 9451629 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 55887032889 in words is "fifty-five billion, eight hundred eighty-seven million, thirty-two thousand, eight hundred eighty-nine".