25961003208 has 192 divisors, whose sum is σ = 82162080000. Its totient is φ = 7402364928.

The previous prime is 25961003113. The next prime is 25961003239. The reversal of 25961003208 is 80230016952.

25961003208 is a `hidden beast` number, since 2 + 5 + 9 + 610 + 0 + 32 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18990541 + ... + 18991907.

It is an arithmetic number, because the mean of its divisors is an integer number (427927500).

Almost surely, 2^25961003208 is an apocalyptic number.

25961003208 is a gapful number since it is divisible by the number (28) 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 25961003208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41081040000).

25961003208 is an abundant number, since it is smaller than the sum of its proper divisors (56201076792).

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

25961003208 is a wasteful number, since it uses less digits than its factorization.

25961003208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2148 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 25961003208 in words is "twenty-five billion, nine hundred sixty-one million, three thousand, two hundred eight".