791656656197 has 4 divisors (see below), whose sum is σ = 863625443136. Its totient is φ = 719687869260.

The previous prime is 791656656157. The next prime is 791656656199.

791656656197 is nontrivially palindromic in base 10.

791656656197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 791656656197 - 2¹⁰ = 791656655173 is a prime.

It is a super-2 number, since 2×791656656197² (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 (791656656199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35984393453 + ... + 35984393474.

It is an arithmetic number, because the mean of its divisors is an integer number (215906360784).

Almost surely, 2^791656656197 is an apocalyptic number.

It is an amenable number.

791656656197 is a deficient number, since it is larger than the sum of its proper divisors (71968786939).

791656656197 is a wasteful number, since it uses less digits than its factorization.

791656656197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71968786938.

The product of its digits is 128595600, while the sum is 68.

The spelling of 791656656197 in words is "seven hundred ninety-one billion, six hundred fifty-six million, six hundred fifty-six thousand, one hundred ninety-seven".