55635857321 has 16 divisors (see below), whose sum is σ = 63276966720. Its totient is φ = 48469686720.

The previous prime is 55635857309. The next prime is 55635857353. The reversal of 55635857321 is 12375853655.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55635857321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55635857321.

It is not an unprimeable number, because it can be changed into a prime (55635851321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084586 + ... + 1134723.

It is an arithmetic number, because the mean of its divisors is an integer number (3954810420).

Almost surely, 2^55635857321 is an apocalyptic number.

It is an amenable number.

55635857321 is a deficient number, since it is larger than the sum of its proper divisors (7641109399).

55635857321 is a wasteful number, since it uses less digits than its factorization.

55635857321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219416.

The product of its digits is 3780000, while the sum is 50.

The spelling of 55635857321 in words is "fifty-five billion, six hundred thirty-five million, eight hundred fifty-seven thousand, three hundred twenty-one".