25783636788 has 144 divisors (see below), whose sum is σ = 80349325056. Its totient is φ = 6788759040.

The previous prime is 25783636759. The next prime is 25783636793. The reversal of 25783636788 is 88763638752.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2060920 + ... + 2073392.

It is an arithmetic number, because the mean of its divisors is an integer number (557981424).

Almost surely, 2^25783636788 is an apocalyptic number.

25783636788 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 25783636788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40174662528).

25783636788 is an abundant number, since it is smaller than the sum of its proper divisors (54565688268).

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

25783636788 is a wasteful number, since it uses less digits than its factorization.

25783636788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13134 (or 13129 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 25783636788 in words is "twenty-five billion, seven hundred eighty-three million, six hundred thirty-six thousand, seven hundred eighty-eight".