77403334691 has 2 divisors, whose sum is σ = 77403334692. Its totient is φ = 77403334690.

The previous prime is 77403334639. The next prime is 77403334709. The reversal of 77403334691 is 19643330477.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77403334691 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77403336691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38701667345 + 38701667346.

It is an arithmetic number, because the mean of its divisors is an integer number (38701667346).

Almost surely, 2^77403334691 is an apocalyptic number.

77403334691 is a deficient number, since it is larger than the sum of its proper divisors (1).

77403334691 is an equidigital number, since it uses as much as digits as its factorization.

77403334691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 77403334691 in words is "seventy-seven billion, four hundred three million, three hundred thirty-four thousand, six hundred ninety-one".