191066977113 has 4 divisors (see below), whose sum is σ = 254755969488. Its totient is φ = 127377984740.

The previous prime is 191066977097. The next prime is 191066977117. The reversal of 191066977113 is 311779660191.

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 191066977113 - 2⁴ = 191066977097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191066977117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31844496183 + ... + 31844496188.

It is an arithmetic number, because the mean of its divisors is an integer number (63688992372).

Almost surely, 2^191066977113 is an apocalyptic number.

It is an amenable number.

191066977113 is a deficient number, since it is larger than the sum of its proper divisors (63688992375).

191066977113 is an equidigital number, since it uses as much as digits as its factorization.

191066977113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63688992374.

The product of its (nonzero) digits is 428652, while the sum is 51.

The spelling of 191066977113 in words is "one hundred ninety-one billion, sixty-six million, nine hundred seventy-seven thousand, one hundred thirteen".