77163644473 has 2 divisors, whose sum is σ = 77163644474. Its totient is φ = 77163644472.

The previous prime is 77163644431. The next prime is 77163644557. The reversal of 77163644473 is 37444636177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76094877609 + 1068766864 = 275853^2 + 32692^2 .

It is a cyclic number.

It is not a de Polignac number, because 77163644473 - 2¹³ = 77163636281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77163644473.

It is not a weakly prime, because it can be changed into another prime (77163644413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38581822236 + 38581822237.

It is an arithmetic number, because the mean of its divisors is an integer number (38581822237).

Almost surely, 2^77163644473 is an apocalyptic number.

It is an amenable number.

77163644473 is a deficient number, since it is larger than the sum of its proper divisors (1).

77163644473 is an equidigital number, since it uses as much as digits as its factorization.

77163644473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 52.

The spelling of 77163644473 in words is "seventy-seven billion, one hundred sixty-three million, six hundred forty-four thousand, four hundred seventy-three".