25804312002 has 96 divisors (see below), whose sum is σ = 67848648192. Its totient is φ = 6919114752.

The previous prime is 25804311979. The next prime is 25804312057. The reversal of 25804312002 is 20021340852.

25804312002 is a `hidden beast` number, since 25 + 8 + 0 + 431 + 200 + 2 = 666.

It is a super-2 number, since 2×25804312002² (a number of 22 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 739063 + ... + 773189.

It is an arithmetic number, because the mean of its divisors is an integer number (706756752).

Almost surely, 2^25804312002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25804312002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33924324096).

25804312002 is an abundant number, since it is smaller than the sum of its proper divisors (42044336190).

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

25804312002 is a wasteful number, since it uses less digits than its factorization.

25804312002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34512 (or 34509 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 25804312002 its reverse (20021340852), we get a palindrome (45825652854).

The spelling of 25804312002 in words is "twenty-five billion, eight hundred four million, three hundred twelve thousand, two".