77646044699 has 2 divisors, whose sum is σ = 77646044700. Its totient is φ = 77646044698.

The previous prime is 77646044687. The next prime is 77646044731. The reversal of 77646044699 is 99644064677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77646044699 - 2¹² = 77646040603 is a prime.

It is not a weakly prime, because it can be changed into another prime (77646044659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38823022349 + 38823022350.

It is an arithmetic number, because the mean of its divisors is an integer number (38823022350).

Almost surely, 2^77646044699 is an apocalyptic number.

77646044699 is a deficient number, since it is larger than the sum of its proper divisors (1).

77646044699 is an equidigital number, since it uses as much as digits as its factorization.

77646044699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 77646044699 in words is "seventy-seven billion, six hundred forty-six million, forty-four thousand, six hundred ninety-nine".