25869161808 has 360 divisors, whose sum is σ = 90592826688. Its totient is φ = 6999519744.

The previous prime is 25869161797. The next prime is 25869161819. The reversal of 25869161808 is 80816196852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25869161797) and next prime (25869161819).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9823660 + ... + 9826292.

Almost surely, 2^25869161808 is an apocalyptic number.

25869161808 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 25869161808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45296413344).

25869161808 is an abundant number, since it is smaller than the sum of its proper divisors (64723664880).

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

25869161808 is a wasteful number, since it uses less digits than its factorization.

25869161808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 25869161808 in words is "twenty-five billion, eight hundred sixty-nine million, one hundred sixty-one thousand, eight hundred eight".