76781316865 has 8 divisors (see below), whose sum is σ = 100513723968. Its totient is φ = 55840957680.

The previous prime is 76781316827. The next prime is 76781316883. The reversal of 76781316865 is 56861318767.

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

It is not a de Polignac number, because 76781316865 - 2²³ = 76772928257 is a prime.

It is a Duffinian 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, 698011917 + ... + 698012026.

It is an arithmetic number, because the mean of its divisors is an integer number (12564215496).

Almost surely, 2^76781316865 is an apocalyptic number.

It is an amenable number.

76781316865 is a deficient number, since it is larger than the sum of its proper divisors (23732407103).

76781316865 is a wasteful number, since it uses less digits than its factorization.

76781316865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396023959.

The product of its digits is 10160640, while the sum is 58.

The spelling of 76781316865 in words is "seventy-six billion, seven hundred eighty-one million, three hundred sixteen thousand, eight hundred sixty-five".