13126256463 has 4 divisors (see below), whose sum is σ = 17501675288. Its totient is φ = 8750837640.

The previous prime is 13126256459. The next prime is 13126256471. The reversal of 13126256463 is 36465262131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36465262131 = 3 ⋅12155087377.

It is not a de Polignac number, because 13126256463 - 2² = 13126256459 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 (13126256443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187709408 + ... + 2187709413.

It is an arithmetic number, because the mean of its divisors is an integer number (4375418822).

Almost surely, 2^13126256463 is an apocalyptic number.

13126256463 is a deficient number, since it is larger than the sum of its proper divisors (4375418825).

13126256463 is an equidigital number, since it uses as much as digits as its factorization.

13126256463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375418824.

The product of its digits is 155520, while the sum is 39.

The spelling of 13126256463 in words is "thirteen billion, one hundred twenty-six million, two hundred fifty-six thousand, four hundred sixty-three".