791963139805 has 8 divisors (see below), whose sum is σ = 961033923000. Its totient is φ = 626451741696.

The previous prime is 791963139763. The next prime is 791963139827. The reversal of 791963139805 is 508931369197.

It can be written as a sum of positive squares in 4 ways, for example, as 7154960569 + 784808179236 = 84587^2 + 885894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 791963139805 - 2¹³ = 791963131613 is a prime.

It is a super-2 number, since 2×791963139805² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889845780 + ... + 889846669.

It is an arithmetic number, because the mean of its divisors is an integer number (120129240375).

Almost surely, 2^791963139805 is an apocalyptic number.

It is an amenable number.

791963139805 is a deficient number, since it is larger than the sum of its proper divisors (169070783195).

791963139805 is a wasteful number, since it uses less digits than its factorization.

791963139805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779692543.

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 791963139805 in words is "seven hundred ninety-one billion, nine hundred sixty-three million, one hundred thirty-nine thousand, eight hundred five".