191512504097 has 4 divisors (see below), whose sum is σ = 192219192576. Its totient is φ = 190805815620.

The previous prime is 191512504091. The next prime is 191512504111. The reversal of 191512504097 is 790405215191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191512504097 - 2⁶ = 191512504033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191512504091) 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, 353343833 + ... + 353344374.

It is an arithmetic number, because the mean of its divisors is an integer number (48054798144).

Almost surely, 2^191512504097 is an apocalyptic number.

It is an amenable number.

191512504097 is a deficient number, since it is larger than the sum of its proper divisors (706688479).

191512504097 is an equidigital number, since it uses as much as digits as its factorization.

191512504097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706688478.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 191512504097 in words is "one hundred ninety-one billion, five hundred twelve million, five hundred four thousand, ninety-seven".