7790011000991 has 2 divisors, whose sum is σ = 7790011000992. Its totient is φ = 7790011000990.

The previous prime is 7790011000883. The next prime is 7790011001027. The reversal of 7790011000991 is 1990001100977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7790011000991 - 2²⁶ = 7789943892127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7790011006991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3895005500495 + 3895005500496.

It is an arithmetic number, because the mean of its divisors is an integer number (3895005500496).

Almost surely, 2^{7790011000991} is an apocalyptic number.

7790011000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7790011000991 is an equidigital number, since it uses as much as digits as its factorization.

7790011000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 44.

The spelling of 7790011000991 in words is "seven trillion, seven hundred ninety billion, eleven million, nine hundred ninety-one", and thus it is an aban number.