13261531521351 has 16 divisors (see below), whose sum is σ = 18793381418240. Its totient is φ = 8294386599360.

The previous prime is 13261531521311. The next prime is 13261531521367. The reversal of 13261531521351 is 15312513516231.

It is not a de Polignac number, because 13261531521351 - 2¹⁴ = 13261531504967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13261531521311) 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, 1129404070 + ... + 1129415811.

It is an arithmetic number, because the mean of its divisors is an integer number (1174586338640).

Almost surely, 2^{13261531521351} is an apocalyptic number.

13261531521351 is a deficient number, since it is larger than the sum of its proper divisors (5531849896889).

13261531521351 is a wasteful number, since it uses less digits than its factorization.

13261531521351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258820006.

The product of its digits is 81000, while the sum is 39.

The spelling of 13261531521351 in words is "thirteen trillion, two hundred sixty-one billion, five hundred thirty-one million, five hundred twenty-one thousand, three hundred fifty-one".