191916952919 has 8 divisors (see below), whose sum is σ = 198123354240. Its totient is φ = 185711522400.

The previous prime is 191916952879. The next prime is 191916952967. The reversal of 191916952919 is 919259619191.

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 191916952919 - 2⁸ = 191916952663 is a prime.

It is a super-2 number, since 2×191916952919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191916952819) 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, 170249 + ... + 642509.

It is an arithmetic number, because the mean of its divisors is an integer number (24765419280).

Almost surely, 2^191916952919 is an apocalyptic number.

191916952919 is a deficient number, since it is larger than the sum of its proper divisors (6206401321).

191916952919 is a wasteful number, since it uses less digits than its factorization.

191916952919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485401.

The product of its digits is 3542940, while the sum is 62.

The spelling of 191916952919 in words is "one hundred ninety-one billion, nine hundred sixteen million, nine hundred fifty-two thousand, nine hundred nineteen".