791147947797 has 24 divisors (see below), whose sum is σ = 1149213756600. Its totient is φ = 524458247040.

The previous prime is 791147947789. The next prime is 791147947813. The reversal of 791147947797 is 797749741197.

791147947797 is a `hidden beast` number, since 7 + 9 + 1 + 147 + 9 + 477 + 9 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1527324561 + 789620623236 = 39081^2 + 888606^2 .

It is not a de Polignac number, because 791147947797 - 2³ = 791147947789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791147947897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17813743 + ... + 17858099.

It is an arithmetic number, because the mean of its divisors is an integer number (47883906525).

Almost surely, 2^791147947797 is an apocalyptic number.

It is an amenable number.

791147947797 is a deficient number, since it is larger than the sum of its proper divisors (358065808803).

791147947797 is a wasteful number, since it uses less digits than its factorization.

791147947797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55493 (or 55490 counting only the distinct ones).

The product of its digits is 196036848, while the sum is 72.

The spelling of 791147947797 in words is "seven hundred ninety-one billion, one hundred forty-seven million, nine hundred forty-seven thousand, seven hundred ninety-seven".