55399272271 has 4 divisors (see below), whose sum is σ = 63313454032. Its totient is φ = 47485090512.

The previous prime is 55399272263. The next prime is 55399272281. The reversal of 55399272271 is 17227299355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55399272271 - 2³ = 55399272263 is a prime.

It is the 235371-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55399272281) by changing a digit.

It is a nontrivial repunit in base 235370.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3957090870 + ... + 3957090883.

It is an arithmetic number, because the mean of its divisors is an integer number (15828363508).

Almost surely, 2^55399272271 is an apocalyptic number.

55399272271 is a deficient number, since it is larger than the sum of its proper divisors (7914181761).

55399272271 is an equidigital number, since it uses as much as digits as its factorization.

55399272271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7914181760.

The product of its digits is 2381400, while the sum is 52.

The spelling of 55399272271 in words is "fifty-five billion, three hundred ninety-nine million, two hundred seventy-two thousand, two hundred seventy-one".