12777512533 has 2 divisors, whose sum is σ = 12777512534. Its totient is φ = 12777512532.

The previous prime is 12777512507. The next prime is 12777512551. The reversal of 12777512533 is 33521577721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8273357764 + 4504154769 = 90958^2 + 67113^2 .

It is a cyclic number.

It is not a de Polignac number, because 12777512533 - 2²¹ = 12775415381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12777512533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12777512233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6388756266 + 6388756267.

It is an arithmetic number, because the mean of its divisors is an integer number (6388756267).

Almost surely, 2^12777512533 is an apocalyptic number.

It is an amenable number.

12777512533 is a deficient number, since it is larger than the sum of its proper divisors (1).

12777512533 is an equidigital number, since it uses as much as digits as its factorization.

12777512533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308700, while the sum is 43.

The spelling of 12777512533 in words is "twelve billion, seven hundred seventy-seven million, five hundred twelve thousand, five hundred thirty-three".