55923825921 has 16 divisors (see below), whose sum is σ = 78498182400. Its totient is φ = 35316440208.

The previous prime is 55923825917. The next prime is 55923825989. The reversal of 55923825921 is 12952832955.

It is not a de Polignac number, because 55923825921 - 2² = 55923825917 is a prime.

It is a super-2 number, since 2×55923825921² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55923825721) 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, 525090 + ... + 622548.

It is an arithmetic number, because the mean of its divisors is an integer number (4906136400).

Almost surely, 2^55923825921 is an apocalyptic number.

It is an amenable number.

55923825921 is a deficient number, since it is larger than the sum of its proper divisors (22574356479).

55923825921 is a wasteful number, since it uses less digits than its factorization.

55923825921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107548.

The product of its digits is 1944000, while the sum is 51.

The spelling of 55923825921 in words is "fifty-five billion, nine hundred twenty-three million, eight hundred twenty-five thousand, nine hundred twenty-one".