776643318641 has 8 divisors (see below), whose sum is σ = 829721064480. Its totient is φ = 724785751008.

The previous prime is 776643318629. The next prime is 776643318673. The reversal of 776643318641 is 146813346677.

776643318641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 776643318641 - 2¹⁴ = 776643302257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776643318601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305043236 + ... + 305045781.

It is an arithmetic number, because the mean of its divisors is an integer number (103715133060).

Almost surely, 2^776643318641 is an apocalyptic number.

It is an amenable number.

776643318641 is a deficient number, since it is larger than the sum of its proper divisors (53077745839).

776643318641 is a wasteful number, since it uses less digits than its factorization.

776643318641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610089103.

The product of its digits is 12192768, while the sum is 56.

The spelling of 776643318641 in words is "seven hundred seventy-six billion, six hundred forty-three million, three hundred eighteen thousand, six hundred forty-one".