76836643817 has 4 divisors (see below), whose sum is σ = 76842881280. Its totient is φ = 76830406356.

The previous prime is 76836643811. The next prime is 76836643831. The reversal of 76836643817 is 71834663867.

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 76836643817 - 2¹² = 76836639721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76836643811) 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, 3100217 + ... + 3124902.

It is an arithmetic number, because the mean of its divisors is an integer number (19210720320).

Almost surely, 2^76836643817 is an apocalyptic number.

It is an amenable number.

76836643817 is a deficient number, since it is larger than the sum of its proper divisors (6237463).

76836643817 is a wasteful number, since it uses less digits than its factorization.

76836643817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237462.

The product of its digits is 24385536, while the sum is 59.

The spelling of 76836643817 in words is "seventy-six billion, eight hundred thirty-six million, six hundred forty-three thousand, eight hundred seventeen".