195428939699 has 8 divisors (see below), whose sum is σ = 226406913120. Its totient is φ = 165215854656.

The previous prime is 195428939681. The next prime is 195428939701. The reversal of 195428939699 is 996939824591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195428939699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195428938699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191221544 + ... + 191222565.

It is an arithmetic number, because the mean of its divisors is an integer number (28300864140).

Almost surely, 2^195428939699 is an apocalyptic number.

195428939699 is a deficient number, since it is larger than the sum of its proper divisors (30977973421).

195428939699 is an equidigital number, since it uses as much as digits as its factorization.

195428939699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382444189.

The product of its digits is 340122240, while the sum is 74.

The spelling of 195428939699 in words is "one hundred ninety-five billion, four hundred twenty-eight million, nine hundred thirty-nine thousand, six hundred ninety-nine".