776649860941 has 2 divisors, whose sum is σ = 776649860942. Its totient is φ = 776649860940.

The previous prime is 776649860927. The next prime is 776649861023. The reversal of 776649860941 is 149068946677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681896092900 + 94753768041 = 825770^2 + 307821^2 .

It is a cyclic number.

It is not a de Polignac number, because 776649860941 - 2⁷ = 776649860813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776649360941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388324930470 + 388324930471.

It is an arithmetic number, because the mean of its divisors is an integer number (388324930471).

Almost surely, 2^776649860941 is an apocalyptic number.

It is an amenable number.

776649860941 is a deficient number, since it is larger than the sum of its proper divisors (1).

776649860941 is an equidigital number, since it uses as much as digits as its factorization.

776649860941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 776649860941 in words is "seven hundred seventy-six billion, six hundred forty-nine million, eight hundred sixty thousand, nine hundred forty-one".