776946005449 has 2 divisors, whose sum is σ = 776946005450. Its totient is φ = 776946005448.

The previous prime is 776946005387. The next prime is 776946005467. The reversal of 776946005449 is 944500649677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739118478400 + 37827527049 = 859720^2 + 194493^2 .

It is a cyclic number.

It is not a de Polignac number, because 776946005449 - 2³¹ = 774798521801 is a prime.

It is not a weakly prime, because it can be changed into another prime (776946005249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388473002724 + 388473002725.

It is an arithmetic number, because the mean of its divisors is an integer number (388473002725).

Almost surely, 2^776946005449 is an apocalyptic number.

It is an amenable number.

776946005449 is a deficient number, since it is larger than the sum of its proper divisors (1).

776946005449 is an equidigital number, since it uses as much as digits as its factorization.

776946005449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 776946005449 in words is "seven hundred seventy-six billion, nine hundred forty-six million, five thousand, four hundred forty-nine".