25828812660 has 96 divisors (see below), whose sum is σ = 82741300992. Its totient is φ = 5897364480.

The previous prime is 25828812637. The next prime is 25828812671. The reversal of 25828812660 is 6621882852.

It is a happy number.

It is a super-3 number, since 3×25828812660³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362544 + ... + 427896.

It is an arithmetic number, because the mean of its divisors is an integer number (861888552).

Almost surely, 2^25828812660 is an apocalyptic number.

25828812660 is a gapful number since it is divisible by the number (20) 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 25828812660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41370650496).

25828812660 is an abundant number, since it is smaller than the sum of its proper divisors (56912488332).

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

25828812660 is a wasteful number, since it uses less digits than its factorization.

25828812660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66313 (or 66311 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 25828812660 in words is "twenty-five billion, eight hundred twenty-eight million, eight hundred twelve thousand, six hundred sixty".