76643410447 has 2 divisors, whose sum is σ = 76643410448. Its totient is φ = 76643410446.

The previous prime is 76643410391. The next prime is 76643410463. The reversal of 76643410447 is 74401434667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76643410447 - 2²⁷ = 76509192719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76643410397 and 76643410406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76643410477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38321705223 + 38321705224.

It is an arithmetic number, because the mean of its divisors is an integer number (38321705224).

Almost surely, 2^76643410447 is an apocalyptic number.

76643410447 is a deficient number, since it is larger than the sum of its proper divisors (1).

76643410447 is an equidigital number, since it uses as much as digits as its factorization.

76643410447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 46.

It can be divided in two parts, 766434 and 10447, that added together give a triangular number (776881 = T₁₂₄₆).

The spelling of 76643410447 in words is "seventy-six billion, six hundred forty-three million, four hundred ten thousand, four hundred forty-seven".