55091901720201 has 8 divisors (see below), whose sum is σ = 73457052968640. Its totient is φ = 36727342475952.

The previous prime is 55091901720197. The next prime is 55091901720259. The reversal of 55091901720201 is 10202710919055.

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

It is not a de Polignac number, because 55091901720201 - 2² = 55091901720197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55091901720001) 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, 147783861 + ... + 148156178.

It is an arithmetic number, because the mean of its divisors is an integer number (9182131621080).

Almost surely, 2^{55091901720201} is an apocalyptic number.

It is an amenable number.

55091901720201 is a deficient number, since it is larger than the sum of its proper divisors (18365151248439).

55091901720201 is a wasteful number, since it uses less digits than its factorization.

55091901720201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296002095.

The product of its (nonzero) digits is 56700, while the sum is 42.

The spelling of 55091901720201 in words is "fifty-five trillion, ninety-one billion, nine hundred one million, seven hundred twenty thousand, two hundred one".