8145436777 has 2 divisors, whose sum is σ = 8145436778. Its totient is φ = 8145436776.

The previous prime is 8145436727. The next prime is 8145436829. The reversal of 8145436777 is 7776345418.

It is an a-pointer prime, because the next prime (8145436829) can be obtained adding 8145436777 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5383303641 + 2762133136 = 73371^2 + 52556^2 .

It is a cyclic number.

It is not a de Polignac number, because 8145436777 - 2²⁷ = 8011219049 is a prime.

It is not a weakly prime, because it can be changed into another prime (8145436727) 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, 4072718388 + 4072718389.

It is an arithmetic number, because the mean of its divisors is an integer number (4072718389).

Almost surely, 2^8145436777 is an apocalyptic number.

It is an amenable number.

8145436777 is a deficient number, since it is larger than the sum of its proper divisors (1).

8145436777 is an equidigital number, since it uses as much as digits as its factorization.

8145436777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 52.

The square root of 8145436777 is about 90252.0735329665. The cubic root of 8145436777 is about 2012.0470203674.

The spelling of 8145436777 in words is "eight billion, one hundred forty-five million, four hundred thirty-six thousand, seven hundred seventy-seven".