25318591284 has 96 divisors (see below), whose sum is σ = 71298196480. Its totient is φ = 6831122688.

The previous prime is 25318591273. The next prime is 25318591289. The reversal of 25318591284 is 48219581352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25318591289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474207 + ... + 524889.

Almost surely, 2^25318591284 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 25318591284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35649098240).

25318591284 is an abundant number, since it is smaller than the sum of its proper divisors (45979605196).

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

25318591284 is a wasteful number, since it uses less digits than its factorization.

25318591284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51029 (or 51027 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The spelling of 25318591284 in words is "twenty-five billion, three hundred eighteen million, five hundred ninety-one thousand, two hundred eighty-four".