77443440433 has 2 divisors, whose sum is σ = 77443440434. Its totient is φ = 77443440432.

The previous prime is 77443440413. The next prime is 77443440443. The reversal of 77443440433 is 33404434477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50675862769 + 26767577664 = 225113^2 + 163608^2 .

It is a cyclic number.

It is not a de Polignac number, because 77443440433 - 2⁵ = 77443440401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77443440433.

It is not a weakly prime, because it can be changed into another prime (77443440413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38721720216 + 38721720217.

It is an arithmetic number, because the mean of its divisors is an integer number (38721720217).

Almost surely, 2^77443440433 is an apocalyptic number.

It is an amenable number.

77443440433 is a deficient number, since it is larger than the sum of its proper divisors (1).

77443440433 is an equidigital number, since it uses as much as digits as its factorization.

77443440433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 43.

The spelling of 77443440433 in words is "seventy-seven billion, four hundred forty-three million, four hundred forty thousand, four hundred thirty-three".