764965774243 has 4 divisors (see below), whose sum is σ = 834508117368. Its totient is φ = 695423431120.

The previous prime is 764965774211. The next prime is 764965774297. The reversal of 764965774243 is 342477569467.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342477569467 = 11 ⋅31134324497.

It is not a de Polignac number, because 764965774243 - 2⁵ = 764965774211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764965784243) 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, 34771171546 + ... + 34771171567.

It is an arithmetic number, because the mean of its divisors is an integer number (208627029342).

Almost surely, 2^764965774243 is an apocalyptic number.

764965774243 is a deficient number, since it is larger than the sum of its proper divisors (69542343125).

764965774243 is a wasteful number, since it uses less digits than its factorization.

764965774243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69542343124.

The product of its digits is 213373440, while the sum is 64.

The spelling of 764965774243 in words is "seven hundred sixty-four billion, nine hundred sixty-five million, seven hundred seventy-four thousand, two hundred forty-three".