774716218321 has 4 divisors (see below), whose sum is σ = 774885264192. Its totient is φ = 774547172452.

The previous prime is 774716218207. The next prime is 774716218351. The reversal of 774716218321 is 123812617477.

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 774716218321 - 2³¹ = 772568734673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (774716218351) 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, 84516061 + ... + 84525226.

It is an arithmetic number, because the mean of its divisors is an integer number (193721316048).

Almost surely, 2^774716218321 is an apocalyptic number.

It is an amenable number.

774716218321 is a deficient number, since it is larger than the sum of its proper divisors (169045871).

774716218321 is a wasteful number, since it uses less digits than its factorization.

774716218321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169045870.

The product of its digits is 790272, while the sum is 49.

The spelling of 774716218321 in words is "seven hundred seventy-four billion, seven hundred sixteen million, two hundred eighteen thousand, three hundred twenty-one".