6402663739 has 2 divisors, whose sum is σ = 6402663740. Its totient is φ = 6402663738.

The previous prime is 6402663713. The next prime is 6402663749. The reversal of 6402663739 is 9373662046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6402663739 - 2²¹ = 6400566587 is a prime.

It is not a weakly prime, because it can be changed into another prime (6402663749) 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 as a sum of consecutive naturals, namely, 3201331869 + 3201331870.

It is an arithmetic number, because the mean of its divisors is an integer number (3201331870).

Almost surely, 2^6402663739 is an apocalyptic number.

6402663739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402663739 is an equidigital number, since it uses as much as digits as its factorization.

6402663739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 46.

The square root of 6402663739 is about 80016.6466368093. The cubic root of 6402663739 is about 1856.8930806589.

It can be divided in two parts, 64026 and 63739, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 6402663739 in words is "six billion, four hundred two million, six hundred sixty-three thousand, seven hundred thirty-nine".