25436504324 has 72 divisors (see below), whose sum is σ = 55959207360. Its totient is φ = 9903072960.

The previous prime is 25436504251. The next prime is 25436504329. The reversal of 25436504324 is 42340563452.

It is not an unprimeable number, because it can be changed into a prime (25436504329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8600654 + ... + 8603610.

Almost surely, 2^25436504324 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 25436504324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27979603680).

25436504324 is an abundant number, since it is smaller than the sum of its proper divisors (30522703036).

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

25436504324 is a wasteful number, since it uses less digits than its factorization.

25436504324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5516 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 38.

The spelling of 25436504324 in words is "twenty-five billion, four hundred thirty-six million, five hundred four thousand, three hundred twenty-four".