25515200000 has 240 divisors, whose sum is σ = 65595676608. Its totient is φ = 9907200000.

The previous prime is 25515199993. The next prime is 25515200017. The reversal of 25515200000 is 251552.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59199785 + ... + 59200215.

Almost surely, 2^25515200000 is an apocalyptic number.

25515200000 is a gapful number since it is divisible by the number (20) 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 25515200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32797838304).

25515200000 is an abundant number, since it is smaller than the sum of its proper divisors (40080476608).

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

25515200000 is an frugal number, since it uses more digits than its factorization.

25515200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

Adding to 25515200000 its reverse (251552), we get a palindrome (25515451552).

The spelling of 25515200000 in words is "twenty-five billion, five hundred fifteen million, two hundred thousand".