13525120040 has 16 divisors (see below), whose sum is σ = 30431520180. Its totient is φ = 5410048000.

The previous prime is 13525120033. The next prime is 13525120043. The reversal of 13525120040 is 4002152531.

It can be written as a sum of positive squares in 2 ways, for example, as 12405949924 + 1119170116 = 111382^2 + 33454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13525119988 and 13525120015.

It is not an unprimeable number, because it can be changed into a prime (13525120043) 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, 169063961 + ... + 169064040.

Almost surely, 2^13525120040 is an apocalyptic number.

13525120040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13525120040 is an abundant number, since it is smaller than the sum of its proper divisors (16906400140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13525120040 is a wasteful number, since it uses less digits than its factorization.

13525120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338128012 (or 338128008 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 13525120040 its reverse (4002152531), we get a palindrome (17527272571).

The spelling of 13525120040 in words is "thirteen billion, five hundred twenty-five million, one hundred twenty thousand, forty".