13125405231016 has 64 divisors (see below), whose sum is σ = 28163543924880. Its totient is φ = 5680950128640.

The previous prime is 13125405231007. The next prime is 13125405231091. The reversal of 13125405231016 is 61013250452131.

It can be written as a sum of positive squares in 8 ways, for example, as 4547360062116 + 8578045168900 = 2132454^2 + 2928830^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12910755 + ... + 13890226.

Almost surely, 2^{13125405231016} is an apocalyptic number.

It is an amenable number.

13125405231016 is an abundant number, since it is smaller than the sum of its proper divisors (15038138693864).

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

13125405231016 is a wasteful number, since it uses less digits than its factorization.

13125405231016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26801294 (or 26801290 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 13125405231016 its reverse (61013250452131), we get a palindrome (74138655683147).

The spelling of 13125405231016 in words is "thirteen trillion, one hundred twenty-five billion, four hundred five million, two hundred thirty-one thousand, sixteen".