768634996091 has 4 divisors (see below), whose sum is σ = 770418372384. Its totient is φ = 766851619800.

The previous prime is 768634996067. The next prime is 768634996147. The reversal of 768634996091 is 190699436867.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 768634996091 - 2⁶ = 768634996027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768634996391) 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, 891687500 + ... + 891688361.

It is an arithmetic number, because the mean of its divisors is an integer number (192604593096).

Almost surely, 2^768634996091 is an apocalyptic number.

768634996091 is a deficient number, since it is larger than the sum of its proper divisors (1783376293).

768634996091 is a wasteful number, since it uses less digits than its factorization.

768634996091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783376292.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 768634996091 in words is "seven hundred sixty-eight billion, six hundred thirty-four million, nine hundred ninety-six thousand, ninety-one".