25211045504 has 64 divisors (see below), whose sum is σ = 51242392800. Its totient is φ = 12351605760.

The previous prime is 25211045491. The next prime is 25211045507. The reversal of 25211045504 is 40554011252.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×25211045504² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25211045507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2388719 + ... + 2399249.

Almost surely, 2^25211045504 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 25211045504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25621196400).

25211045504 is an abundant number, since it is smaller than the sum of its proper divisors (26031347296).

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

25211045504 is a wasteful number, since it uses less digits than its factorization.

25211045504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10921 (or 10909 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 25211045504 its reverse (40554011252), we get a palindrome (65765056756).

The spelling of 25211045504 in words is "twenty-five billion, two hundred eleven million, forty-five thousand, five hundred four".