195393728015 has 4 divisors (see below), whose sum is σ = 234472473624. Its totient is φ = 156314982408.

The previous prime is 195393727987. The next prime is 195393728021. The reversal of 195393728015 is 510827393591.

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 195393728015 - 2¹⁰ = 195393726991 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, 19539372797 + ... + 19539372806.

It is an arithmetic number, because the mean of its divisors is an integer number (58618118406).

Almost surely, 2^195393728015 is an apocalyptic number.

195393728015 is a deficient number, since it is larger than the sum of its proper divisors (39078745609).

195393728015 is an equidigital number, since it uses as much as digits as its factorization.

195393728015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39078745608.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 195393728015 in words is "one hundred ninety-five billion, three hundred ninety-three million, seven hundred twenty-eight thousand, fifteen".