55987451868 has 24 divisors (see below), whose sum is σ = 130859955072. Its totient is φ = 18630688624.

The previous prime is 55987451843. The next prime is 55987451903. The reversal of 55987451868 is 86815478955.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55987451799 and 55987451808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3967080 + ... + 3981167.

It is an arithmetic number, because the mean of its divisors is an integer number (5452498128).

Almost surely, 2^55987451868 is an apocalyptic number.

It is an amenable number.

55987451868 is an abundant number, since it is smaller than the sum of its proper divisors (74872503204).

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

55987451868 is a wasteful number, since it uses less digits than its factorization.

55987451868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948841 (or 7948839 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 66.

The spelling of 55987451868 in words is "fifty-five billion, nine hundred eighty-seven million, four hundred fifty-one thousand, eight hundred sixty-eight".