191385828955 has 4 divisors (see below), whose sum is σ = 229662994752. Its totient is φ = 153108663160.

The previous prime is 191385828917. The next prime is 191385829003. The reversal of 191385828955 is 559828583191.

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

It is not a de Polignac number, because 191385828955 - 2⁹ = 191385828443 is a prime.

It is a Duffinian 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, 19138582891 + ... + 19138582900.

It is an arithmetic number, because the mean of its divisors is an integer number (57415748688).

Almost surely, 2^191385828955 is an apocalyptic number.

191385828955 is a deficient number, since it is larger than the sum of its proper divisors (38277165797).

191385828955 is an equidigital number, since it uses as much as digits as its factorization.

191385828955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38277165796.

The product of its digits is 31104000, while the sum is 64.

The spelling of 191385828955 in words is "one hundred ninety-one billion, three hundred eighty-five million, eight hundred twenty-eight thousand, nine hundred fifty-five".