4991165626679 has 2 divisors, whose sum is σ = 4991165626680. Its totient is φ = 4991165626678.

The previous prime is 4991165626669. The next prime is 4991165626751. The reversal of 4991165626679 is 9766265611994.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991165626679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4991165626639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495582813339 + 2495582813340.

It is an arithmetic number, because the mean of its divisors is an integer number (2495582813340).

Almost surely, 2^{4991165626679} is an apocalyptic number.

4991165626679 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991165626679 is an equidigital number, since it uses as much as digits as its factorization.

4991165626679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264539520, while the sum is 71.

The spelling of 4991165626679 in words is "four trillion, nine hundred ninety-one billion, one hundred sixty-five million, six hundred twenty-six thousand, six hundred seventy-nine".