791031520663 has 2 divisors, whose sum is σ = 791031520664. Its totient is φ = 791031520662.

The previous prime is 791031520661. The next prime is 791031520673. The reversal of 791031520663 is 366025130197.

It is a weak prime.

It is an emirp because it is prime and its reverse (366025130197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 791031520663 - 2¹ = 791031520661 is a prime.

Together with 791031520661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791031520661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395515760331 + 395515760332.

It is an arithmetic number, because the mean of its divisors is an integer number (395515760332).

Almost surely, 2^791031520663 is an apocalyptic number.

791031520663 is a deficient number, since it is larger than the sum of its proper divisors (1).

791031520663 is an equidigital number, since it uses as much as digits as its factorization.

791031520663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The spelling of 791031520663 in words is "seven hundred ninety-one billion, thirty-one million, five hundred twenty thousand, six hundred sixty-three".