55689521144 has 32 divisors (see below), whose sum is σ = 108988290720. Its totient is φ = 26626655616.

The previous prime is 55689521137. The next prime is 55689521197. The reversal of 55689521144 is 44112598655.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55689521092 and 55689521101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646334 + ... + 727410.

It is an arithmetic number, because the mean of its divisors is an integer number (3405884085).

Almost surely, 2^55689521144 is an apocalyptic number.

It is an amenable number.

55689521144 is a deficient number, since it is larger than the sum of its proper divisors (53298769576).

55689521144 is a wasteful number, since it uses less digits than its factorization.

55689521144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84839 (or 84835 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 50.

The spelling of 55689521144 in words is "fifty-five billion, six hundred eighty-nine million, five hundred twenty-one thousand, one hundred forty-four".