25018404864 has 104 divisors (see below), whose sum is σ = 69008847360. Its totient is φ = 8051785728.

The previous prime is 25018404823. The next prime is 25018404911. The reversal of 25018404864 is 46840481052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321249 + ... + 391455.

Almost surely, 2^25018404864 is an apocalyptic number.

25018404864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25018404864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34504423680).

25018404864 is an abundant number, since it is smaller than the sum of its proper divisors (43990442496).

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

25018404864 is an equidigital number, since it uses as much as digits as its factorization.

25018404864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70263 (or 70241 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The spelling of 25018404864 in words is "twenty-five billion, eighteen million, four hundred four thousand, eight hundred sixty-four".