25561416 has 16 divisors (see below), whose sum is σ = 63903600. Its totient is φ = 8520464.

The previous prime is 25561411. The next prime is 25561433. The reversal of 25561416 is 61416552.

It is not an unprimeable number, because it can be changed into a prime (25561411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532506 + ... + 532553.

It is an arithmetic number, because the mean of its divisors is an integer number (3993975).

Almost surely, 2^25561416 is an apocalyptic number.

It is an amenable number.

25561416 is an abundant number, since it is smaller than the sum of its proper divisors (38342184).

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

25561416 is a wasteful number, since it uses less digits than its factorization.

25561416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065068 (or 1065064 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 25561416 is about 5055.8299022020. The cubic root of 25561416 is about 294.5743780745.

Adding to 25561416 its reverse (61416552), we get a palindrome (86977968).

The spelling of 25561416 in words is "twenty-five million, five hundred sixty-one thousand, four hundred sixteen".