799856658997 has 4 divisors (see below), whose sum is σ = 872570900736. Its totient is φ = 727142417260.

The previous prime is 799856658947. The next prime is 799856659039.

799856658997 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-799856658997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799856658947) 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 3 ways as a sum of consecutive naturals, for example, 36357120853 + ... + 36357120874.

It is an arithmetic number, because the mean of its divisors is an integer number (218142725184).

Almost surely, 2^799856658997 is an apocalyptic number.

It is an amenable number.

799856658997 is a deficient number, since it is larger than the sum of its proper divisors (72714241739).

799856658997 is a wasteful number, since it uses less digits than its factorization.

799856658997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72714241738.

The product of its digits is 18517766400, while the sum is 88.

The spelling of 799856658997 in words is "seven hundred ninety-nine billion, eight hundred fifty-six million, six hundred fifty-eight thousand, nine hundred ninety-seven".