25155450544 has 80 divisors (see below), whose sum is σ = 57026635776. Its totient is φ = 10525536000.

The previous prime is 25155450503. The next prime is 25155450547. The reversal of 25155450544 is 44505455152.

It is a junction number, because it is equal to n+sod(n) for n = 25155450497 and 25155450506.

It is not an unprimeable number, because it can be changed into a prime (25155450547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2210469 + ... + 2221819.

Almost surely, 2^25155450544 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 25155450544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28513317888).

25155450544 is an abundant number, since it is smaller than the sum of its proper divisors (31871185232).

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

25155450544 is a wasteful number, since it uses less digits than its factorization.

25155450544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11834 (or 11828 counting only the distinct ones).

The product of its (nonzero) digits is 400000, while the sum is 40.

The spelling of 25155450544 in words is "twenty-five billion, one hundred fifty-five million, four hundred fifty thousand, five hundred forty-four".