12986777591 has 2 divisors, whose sum is σ = 12986777592. Its totient is φ = 12986777590.

The previous prime is 12986777539. The next prime is 12986777597. The reversal of 12986777591 is 19577768921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12986777591 - 2¹⁰ = 12986776567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12986777597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493388795 + 6493388796.

It is an arithmetic number, because the mean of its divisors is an integer number (6493388796).

Almost surely, 2^12986777591 is an apocalyptic number.

12986777591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12986777591 is an equidigital number, since it uses as much as digits as its factorization.

12986777591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 62.

The spelling of 12986777591 in words is "twelve billion, nine hundred eighty-six million, seven hundred seventy-seven thousand, five hundred ninety-one".