791917155547 has 12 divisors (see below), whose sum is σ = 975398562360. Its totient is φ = 638857536576.

The previous prime is 791917155527. The next prime is 791917155551. The reversal of 791917155547 is 745551719197.

It is a de Polignac number, because none of the positive numbers 2^k-791917155547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791917155527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475339597 + ... + 475341262.

It is an arithmetic number, because the mean of its divisors is an integer number (81283213530).

Almost surely, 2^791917155547 is an apocalyptic number.

791917155547 is a deficient number, since it is larger than the sum of its proper divisors (183481406813).

791917155547 is a wasteful number, since it uses less digits than its factorization.

791917155547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950680890 (or 950680883 counting only the distinct ones).

The product of its digits is 13891500, while the sum is 61.

The spelling of 791917155547 in words is "seven hundred ninety-one billion, nine hundred seventeen million, one hundred fifty-five thousand, five hundred forty-seven".