68926619491 has 16 divisors (see below), whose sum is σ = 70282692288. Its totient is φ = 67582771200.

The previous prime is 68926619483. The next prime is 68926619519. The reversal of 68926619491 is 19491662986.

It is a cyclic number.

It is not a de Polignac number, because 68926619491 - 2³ = 68926619483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68926619401) 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 15 ways as a sum of consecutive naturals, for example, 10146306 + ... + 10153096.

It is an arithmetic number, because the mean of its divisors is an integer number (4392668268).

Almost surely, 2^68926619491 is an apocalyptic number.

68926619491 is a deficient number, since it is larger than the sum of its proper divisors (1356072797).

68926619491 is a wasteful number, since it uses less digits than its factorization.

68926619491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662.

The product of its digits is 10077696, while the sum is 61.

The spelling of 68926619491 in words is "sixty-eight billion, nine hundred twenty-six million, six hundred nineteen thousand, four hundred ninety-one".