13187765531087 has 16 divisors (see below), whose sum is σ = 15379752326400. Its totient is φ = 11303480093976.

The previous prime is 13187765531077. The next prime is 13187765531093. The reversal of 13187765531087 is 78013556778131.

It is not a de Polignac number, because 13187765531087 - 2⁸ = 13187765530831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13187765531077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12058208 + ... + 13106330.

It is an arithmetic number, because the mean of its divisors is an integer number (961234520400).

Almost surely, 2^{13187765531087} is an apocalyptic number.

13187765531087 is a deficient number, since it is larger than the sum of its proper divisors (2191986795313).

13187765531087 is an equidigital number, since it uses as much as digits as its factorization.

13187765531087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084827 (or 1084813 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 62.

The spelling of 13187765531087 in words is "thirteen trillion, one hundred eighty-seven billion, seven hundred sixty-five million, five hundred thirty-one thousand, eighty-seven".