25133404540 has 96 divisors (see below), whose sum is σ = 55436451840. Its totient is φ = 9562565376.

The previous prime is 25133404531. The next prime is 25133404561. The reversal of 25133404540 is 4540433152.

It is a super-2 number, since 2×25133404540² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6333637 + ... + 6337603.

It is an arithmetic number, because the mean of its divisors is an integer number (577463040).

Almost surely, 2^25133404540 is an apocalyptic number.

25133404540 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 25133404540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27718225920).

25133404540 is an abundant number, since it is smaller than the sum of its proper divisors (30303047300).

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

25133404540 is a wasteful number, since it uses less digits than its factorization.

25133404540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211 (or 4209 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 25133404540 its reverse (4540433152), we get a palindrome (29673837692).

The spelling of 25133404540 in words is "twenty-five billion, one hundred thirty-three million, four hundred four thousand, five hundred forty".