55965447321 has 64 divisors (see below), whose sum is σ = 90604032000. Its totient is φ = 30016417536.

The previous prime is 55965447311. The next prime is 55965447347. The reversal of 55965447321 is 12374456955.

It is not a de Polignac number, because 55965447321 - 2⁹ = 55965446809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55965447311) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 28951671 + ... + 28953603.

It is an arithmetic number, because the mean of its divisors is an integer number (1415688000).

Almost surely, 2^55965447321 is an apocalyptic number.

It is an amenable number.

55965447321 is a deficient number, since it is larger than the sum of its proper divisors (34638584679).

55965447321 is a wasteful number, since it uses less digits than its factorization.

55965447321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598.

The product of its digits is 4536000, while the sum is 51.

The spelling of 55965447321 in words is "fifty-five billion, nine hundred sixty-five million, four hundred forty-seven thousand, three hundred twenty-one".