191142692705 has 4 divisors (see below), whose sum is σ = 229371231252. Its totient is φ = 152914154160.

The previous prime is 191142692701. The next prime is 191142692749. The reversal of 191142692705 is 507296241191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60645465169 + 130497227536 = 246263^2 + 361244^2 .

It is not a de Polignac number, because 191142692705 - 2² = 191142692701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191142692705.

It is not an unprimeable number, because it can be changed into a prime (191142692701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19114269266 + ... + 19114269275.

It is an arithmetic number, because the mean of its divisors is an integer number (57342807813).

Almost surely, 2^191142692705 is an apocalyptic number.

It is an amenable number.

191142692705 is a deficient number, since it is larger than the sum of its proper divisors (38228538547).

191142692705 is an equidigital number, since it uses as much as digits as its factorization.

191142692705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38228538546.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 191142692705 in words is "one hundred ninety-one billion, one hundred forty-two million, six hundred ninety-two thousand, seven hundred five".