771948777098791 has 2 divisors, whose sum is σ = 771948777098792. Its totient is φ = 771948777098790.

The previous prime is 771948777098783. The next prime is 771948777098803. The reversal of 771948777098791 is 197890777849177.

It is a happy number.

771948777098791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 771948777098791 - 2³ = 771948777098783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 771948777098696 and 771948777098705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (771948777098711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385974388549395 + 385974388549396.

It is an arithmetic number, because the mean of its divisors is an integer number (385974388549396).

Almost surely, 2^{771948777098791} is an apocalyptic number.

771948777098791 is a deficient number, since it is larger than the sum of its proper divisors (1).

771948777098791 is an equidigital number, since it uses as much as digits as its factorization.

771948777098791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21956126976, while the sum is 91.

The spelling of 771948777098791 in words is "seven hundred seventy-one trillion, nine hundred forty-eight billion, seven hundred seventy-seven million, ninety-eight thousand, seven hundred ninety-one".