791656912687 has 24 divisors (see below), whose sum is σ = 838123216560. Its totient is φ = 747621557760.

The previous prime is 791656912639. The next prime is 791656912721. The reversal of 791656912687 is 786219656197.

It is a de Polignac number, because none of the positive numbers 2^k-791656912687 is a prime.

It is a super-2 number, since 2×791656912687² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791651912687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21481737 + ... + 21518557.

It is an arithmetic number, because the mean of its divisors is an integer number (34921800690).

Almost surely, 2^791656912687 is an apocalyptic number.

791656912687 is a deficient number, since it is larger than the sum of its proper divisors (46466303873).

791656912687 is a wasteful number, since it uses less digits than its factorization.

791656912687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37383 (or 37360 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 67.

The spelling of 791656912687 in words is "seven hundred ninety-one billion, six hundred fifty-six million, nine hundred twelve thousand, six hundred eighty-seven".