195421009055 has 4 divisors (see below), whose sum is σ = 234505210872. Its totient is φ = 156336807240.

The previous prime is 195421009033. The next prime is 195421009067. The reversal of 195421009055 is 550900124591.

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

It is not a de Polignac number, because 195421009055 - 2⁸ = 195421008799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19542100901 + ... + 19542100910.

It is an arithmetic number, because the mean of its divisors is an integer number (58626302718).

Almost surely, 2^195421009055 is an apocalyptic number.

195421009055 is a deficient number, since it is larger than the sum of its proper divisors (39084201817).

195421009055 is an equidigital number, since it uses as much as digits as its factorization.

195421009055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39084201816.

The product of its (nonzero) digits is 81000, while the sum is 41.

The spelling of 195421009055 in words is "one hundred ninety-five billion, four hundred twenty-one million, nine thousand, fifty-five".