55575195391 has 4 divisors (see below), whose sum is σ = 55584419400. Its totient is φ = 55565971384.

The previous prime is 55575195353. The next prime is 55575195437. The reversal of 55575195391 is 19359157555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19359157555 = 5 ⋅3871831511.

It is a cyclic number.

It is not a de Polignac number, because 55575195391 - 2¹¹ = 55575193343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55575195331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4602961 + ... + 4615018.

It is an arithmetic number, because the mean of its divisors is an integer number (13896104850).

Almost surely, 2^55575195391 is an apocalyptic number.

55575195391 is a deficient number, since it is larger than the sum of its proper divisors (9224009).

55575195391 is an equidigital number, since it uses as much as digits as its factorization.

55575195391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9224008.

The product of its digits is 5315625, while the sum is 55.

The spelling of 55575195391 in words is "fifty-five billion, five hundred seventy-five million, one hundred ninety-five thousand, three hundred ninety-one".