77964788843 has 2 divisors, whose sum is σ = 77964788844. Its totient is φ = 77964788842.

The previous prime is 77964788831. The next prime is 77964788849. The reversal of 77964788843 is 34888746977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77964788843 - 2⁴ = 77964788827 is a prime.

It is not a weakly prime, because it can be changed into another prime (77964788849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38982394421 + 38982394422.

It is an arithmetic number, because the mean of its divisors is an integer number (38982394422).

Almost surely, 2^77964788843 is an apocalyptic number.

77964788843 is a deficient number, since it is larger than the sum of its proper divisors (1).

77964788843 is an equidigital number, since it uses as much as digits as its factorization.

77964788843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 455196672, while the sum is 71.

The spelling of 77964788843 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, eight hundred forty-three".