13025021256 has 384 divisors, whose sum is σ = 42394060800. Its totient is φ = 3576545280.

The previous prime is 13025021249. The next prime is 13025021267. The reversal of 13025021256 is 65212052031.

It is a happy number.

13025021256 is a `hidden beast` number, since 1 + 30 + 2 + 502 + 125 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19353336 + ... + 19354008.

It is an arithmetic number, because the mean of its divisors is an integer number (110401200).

Almost surely, 2^13025021256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13025021256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21197030400).

13025021256 is an abundant number, since it is smaller than the sum of its proper divisors (29369039544).

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

13025021256 is a wasteful number, since it uses less digits than its factorization.

13025021256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13025021256 its reverse (65212052031), we get a palindrome (78237073287).

The spelling of 13025021256 in words is "thirteen billion, twenty-five million, twenty-one thousand, two hundred fifty-six".