13525440000 has 400 divisors, whose sum is σ = 45879651312. Its totient is φ = 3538944000.

The previous prime is 13525439999. The next prime is 13525440001. The reversal of 13525440000 is 4452531.

It is an interprime number because it is at equal distance from previous prime (13525439999) and next prime (13525440001).

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13525440001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70079904 + ... + 70080096.

Almost surely, 2^13525440000 is an apocalyptic number.

13525440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13525440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22939825656).

13525440000 is an abundant number, since it is smaller than the sum of its proper divisors (32354211312).

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

13525440000 is an frugal number, since it uses more digits than its factorization.

13525440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 13525440000 its reverse (4452531), we get a palindrome (13529892531).

The spelling of 13525440000 in words is "thirteen billion, five hundred twenty-five million, four hundred forty thousand".