25951161600 has 648 divisors, whose sum is σ = 114215384192. Its totient is φ = 5474304000.

The previous prime is 25951161583. The next prime is 25951161659. The reversal of 25951161600 is 616115952.

25951161600 is a `hidden beast` number, since 2 + 595 + 1 + 1 + 6 + 1 + 60 + 0 = 666.

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

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, 5239125 + ... + 5244075.

Almost surely, 2^25951161600 is an apocalyptic number.

25951161600 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 25951161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57107692096).

25951161600 is an abundant number, since it is smaller than the sum of its proper divisors (88264222592).

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

25951161600 is a wasteful number, since it uses less digits than its factorization.

25951161600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003 (or 4981 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 25951161600 in words is "twenty-five billion, nine hundred fifty-one million, one hundred sixty-one thousand, six hundred".