55191044321 has 8 divisors (see below), whose sum is σ = 63076900224. Its totient is φ = 47305543680.

The previous prime is 55191044317. The next prime is 55191044351. The reversal of 55191044321 is 12344019155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55191044321 - 2² = 55191044317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55191044351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563996 + ... + 654578.

It is an arithmetic number, because the mean of its divisors is an integer number (7884612528).

Almost surely, 2^55191044321 is an apocalyptic number.

It is an amenable number.

55191044321 is a deficient number, since it is larger than the sum of its proper divisors (7885855903).

55191044321 is an equidigital number, since it uses as much as digits as its factorization.

55191044321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177631.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 55191044321 in words is "fifty-five billion, one hundred ninety-one million, forty-four thousand, three hundred twenty-one".