25780809600 has 960 divisors, whose sum is σ = 117198644640. Its totient is φ = 5434490880.

The previous prime is 25780809583. The next prime is 25780809631. The reversal of 25780809600 is 690808752.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 23586654 + ... + 23587746.

Almost surely, 2^25780809600 is an apocalyptic number.

25780809600 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 25780809600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58599322320).

25780809600 is an abundant number, since it is smaller than the sum of its proper divisors (91417835040).

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

25780809600 is a wasteful number, since it uses less digits than its factorization.

25780809600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 25780809600 in words is "twenty-five billion, seven hundred eighty million, eight hundred nine thousand, six hundred".