13125440021504 has 22 divisors (see below), whose sum is σ = 26238062232534. Its totient is φ = 6562720010240.

The previous prime is 13125440021503. The next prime is 13125440021569. The reversal of 13125440021504 is 40512004452131.

It can be written as a sum of positive squares in only one way, i.e., 10602577945600 + 2522862075904 = 3256160^2 + 1588352^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (13125440021503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6408905237 + ... + 6408907284.

Almost surely, 2^{13125440021504} is an apocalyptic number.

It is an amenable number.

13125440021504 is a deficient number, since it is larger than the sum of its proper divisors (13112622211030).

13125440021504 is an equidigital number, since it uses as much as digits as its factorization.

13125440021504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817812541 (or 12817812523 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 13125440021504 its reverse (40512004452131), we get a palindrome (53637444473635).

The spelling of 13125440021504 in words is "thirteen trillion, one hundred twenty-five billion, four hundred forty million, twenty-one thousand, five hundred four".