768412460521 has 4 divisors (see below), whose sum is σ = 771402392532. Its totient is φ = 765422528512.

The previous prime is 768412460477. The next prime is 768412460527. The reversal of 768412460521 is 125064214867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125064214867 = 139 ⋅899742553.

It can be written as a sum of positive squares in 2 ways, for example, as 639200250000 + 129212210521 = 799500^2 + 359461^2 .

It is a cyclic number.

It is not a de Polignac number, because 768412460521 - 2⁷ = 768412460393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768412460527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494965620 + ... + 1494966133.

It is an arithmetic number, because the mean of its divisors is an integer number (192850598133).

Almost surely, 2^768412460521 is an apocalyptic number.

It is an amenable number.

768412460521 is a deficient number, since it is larger than the sum of its proper divisors (2989932011).

768412460521 is a wasteful number, since it uses less digits than its factorization.

768412460521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989932010.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 768412460521 in words is "seven hundred sixty-eight billion, four hundred twelve million, four hundred sixty thousand, five hundred twenty-one".