55309392321 has 16 divisors (see below), whose sum is σ = 73941009408. Its totient is φ = 36775481600.

The previous prime is 55309392241. The next prime is 55309392323. The reversal of 55309392321 is 12329390355.

It is a cyclic number.

It is not a de Polignac number, because 55309392321 - 2²⁵ = 55275837889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55309392323) 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, 1773856 + ... + 1804766.

It is an arithmetic number, because the mean of its divisors is an integer number (4621313088).

Almost surely, 2^55309392321 is an apocalyptic number.

It is an amenable number.

55309392321 is a deficient number, since it is larger than the sum of its proper divisors (18631617087).

55309392321 is a wasteful number, since it uses less digits than its factorization.

55309392321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32472.

The product of its (nonzero) digits is 218700, while the sum is 42.

The spelling of 55309392321 in words is "fifty-five billion, three hundred nine million, three hundred ninety-two thousand, three hundred twenty-one".