13129287536 has 20 divisors (see below), whose sum is σ = 25441191600. Its totient is φ = 6563818752.

The previous prime is 13129287529. The next prime is 13129287551. The reversal of 13129287536 is 63578292131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91805 + ... + 186243.

It is an arithmetic number, because the mean of its divisors is an integer number (1272059580).

Almost surely, 2^13129287536 is an apocalyptic number.

13129287536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13129287536 is a deficient number, since it is larger than the sum of its proper divisors (12311904064).

13129287536 is an equidigital number, since it uses as much as digits as its factorization.

13129287536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103136 (or 103130 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The spelling of 13129287536 in words is "thirteen billion, one hundred twenty-nine million, two hundred eighty-seven thousand, five hundred thirty-six".