195828206421 has 4 divisors (see below), whose sum is σ = 261104275232. Its totient is φ = 130552137612.

The previous prime is 195828206411. The next prime is 195828206443. The reversal of 195828206421 is 124602828591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 195828206421 - 2¹¹ = 195828204373 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 (195828206411) 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, 32638034401 + ... + 32638034406.

It is an arithmetic number, because the mean of its divisors is an integer number (65276068808).

Almost surely, 2^195828206421 is an apocalyptic number.

It is an amenable number.

195828206421 is a deficient number, since it is larger than the sum of its proper divisors (65276068811).

195828206421 is an equidigital number, since it uses as much as digits as its factorization.

195828206421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65276068810.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 195828206421 in words is "one hundred ninety-five billion, eight hundred twenty-eight million, two hundred six thousand, four hundred twenty-one".