25001210040 has 128 divisors (see below), whose sum is σ = 78998976000. Its totient is φ = 6312273408.

The previous prime is 25001210029. The next prime is 25001210041. The reversal of 25001210040 is 4001210052.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25001210041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7086757 + ... + 7090283.

It is an arithmetic number, because the mean of its divisors is an integer number (617179500).

Almost surely, 2^25001210040 is an apocalyptic number.

25001210040 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 25001210040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39499488000).

25001210040 is an abundant number, since it is smaller than the sum of its proper divisors (53997765960).

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

25001210040 is a wasteful number, since it uses less digits than its factorization.

25001210040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669 (or 6665 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 25001210040 its reverse (4001210052), we get a palindrome (29002420092).

The spelling of 25001210040 in words is "twenty-five billion, one million, two hundred ten thousand, forty".