55621651264 has 28 divisors (see below), whose sum is σ = 113357305924. Its totient is φ = 27059180544.

The previous prime is 55621651247. The next prime is 55621651271. The reversal of 55621651264 is 46215612655.

It can be written as a sum of positive squares in 2 ways, for example, as 30849409600 + 24772241664 = 175640^2 + 157392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55621651264.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11742069 + ... + 11746804.

Almost surely, 2^55621651264 is an apocalyptic number.

It is an amenable number.

55621651264 is an abundant number, since it is smaller than the sum of its proper divisors (57735654660).

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

55621651264 is a wasteful number, since it uses less digits than its factorization.

55621651264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23488922 (or 23488912 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The spelling of 55621651264 in words is "fifty-five billion, six hundred twenty-one million, six hundred fifty-one thousand, two hundred sixty-four".