13285127505 has 32 divisors (see below), whose sum is σ = 23680661760. Its totient is φ = 6314837760.

The previous prime is 13285127483. The next prime is 13285127519. The reversal of 13285127505 is 50572158231.

It is not a de Polignac number, because 13285127505 - 2¹² = 13285123409 is a prime.

It is a super-2 number, since 2×13285127505² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1168981 + ... + 1180290.

It is an arithmetic number, because the mean of its divisors is an integer number (740020680).

Almost surely, 2^13285127505 is an apocalyptic number.

13285127505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13285127505 is a deficient number, since it is larger than the sum of its proper divisors (10395534255).

13285127505 is a wasteful number, since it uses less digits than its factorization.

13285127505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349321.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 13285127505 in words is "thirteen billion, two hundred eighty-five million, one hundred twenty-seven thousand, five hundred five".