25541424416 has 48 divisors (see below), whose sum is σ = 51715379520. Its totient is φ = 12408318720.

The previous prime is 25541424409. The next prime is 25541424431. The reversal of 25541424416 is 61442414552.

It is a super-2 number, since 2×25541424416² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25541424416.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860381 + ... + 889571.

It is an arithmetic number, because the mean of its divisors is an integer number (1077403740).

Almost surely, 2^25541424416 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 25541424416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25857689760).

25541424416 is an abundant number, since it is smaller than the sum of its proper divisors (26173955104).

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

25541424416 is a wasteful number, since it uses less digits than its factorization.

25541424416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29977 (or 29969 counting only the distinct ones).

The product of its digits is 153600, while the sum is 38.

Adding to 25541424416 its reverse (61442414552), we get a palindrome (86983838968).

The spelling of 25541424416 in words is "twenty-five billion, five hundred forty-one million, four hundred twenty-four thousand, four hundred sixteen".