12565043479 has 2 divisors, whose sum is σ = 12565043480. Its totient is φ = 12565043478.

The previous prime is 12565043431. The next prime is 12565043483. The reversal of 12565043479 is 97434056521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12565043479 - 2²¹ = 12562946327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12565023479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282521739 + 6282521740.

It is an arithmetic number, because the mean of its divisors is an integer number (6282521740).

Almost surely, 2^12565043479 is an apocalyptic number.

12565043479 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565043479 is an equidigital number, since it uses as much as digits as its factorization.

12565043479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 12565043479 in words is "twelve billion, five hundred sixty-five million, forty-three thousand, four hundred seventy-nine".