25184420416 has 63 divisors (see below), whose sum is σ = 50797238131. Its totient is φ = 12388444544.

The previous prime is 25184420399. The next prime is 25184420419. The reversal of 25184420416 is 61402448152.

The square root of 25184420416 is 158696.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×25184420416² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25184420419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 105374025 + ... + 105374263.

Almost surely, 2^25184420416 is an apocalyptic number.

25184420416 is the 158696-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25184420416

25184420416 is an abundant number, since it is smaller than the sum of its proper divisors (25612817715).

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

25184420416 is an frugal number, since it uses more digits than its factorization.

25184420416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

Adding to 25184420416 its reverse (61402448152), we get a palindrome (86586868568).

The spelling of 25184420416 in words is "twenty-five billion, one hundred eighty-four million, four hundred twenty thousand, four hundred sixteen".