13261615487 has 2 divisors, whose sum is σ = 13261615488. Its totient is φ = 13261615486.

The previous prime is 13261615429. The next prime is 13261615511. The reversal of 13261615487 is 78451616231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13261615487 - 2²² = 13257421183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13261615387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630807743 + 6630807744.

It is an arithmetic number, because the mean of its divisors is an integer number (6630807744).

Almost surely, 2^13261615487 is an apocalyptic number.

13261615487 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261615487 is an equidigital number, since it uses as much as digits as its factorization.

13261615487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The spelling of 13261615487 in words is "thirteen billion, two hundred sixty-one million, six hundred fifteen thousand, four hundred eighty-seven".