191869791969 has 8 divisors (see below), whose sum is σ = 255834561600. Its totient is φ = 127909108496.

The previous prime is 191869791929. The next prime is 191869791979. The reversal of 191869791969 is 969197968191.

191869791969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 191869791969 - 2²¹ = 191867694817 is a prime.

It is a super-2 number, since 2×191869791969² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191869791969.

It is not an unprimeable number, because it can be changed into a prime (191869791929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910242 + ... + 1101035.

It is an arithmetic number, because the mean of its divisors is an integer number (31979320200).

Almost surely, 2^191869791969 is an apocalyptic number.

It is an amenable number.

191869791969 is a deficient number, since it is larger than the sum of its proper divisors (63964769631).

191869791969 is a wasteful number, since it uses less digits than its factorization.

191869791969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043079.

The product of its digits is 119042784, while the sum is 75.

The spelling of 191869791969 in words is "one hundred ninety-one billion, eight hundred sixty-nine million, seven hundred ninety-one thousand, nine hundred sixty-nine".