25688507936 has 144 divisors (see below), whose sum is σ = 63469718424. Its totient is φ = 10144382976.

The previous prime is 25688507899. The next prime is 25688507939. The reversal of 25688507936 is 63970588652.

It can be written as a sum of positive squares in 4 ways, for example, as 25427491600 + 261016336 = 159460^2 + 16156^2 .

It is not an unprimeable number, because it can be changed into a prime (25688507939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22279136 + ... + 22280288.

Almost surely, 2^25688507936 is an apocalyptic number.

25688507936 is a gapful number since it is divisible by the number (26) 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 25688507936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31734859212).

25688507936 is an abundant number, since it is smaller than the sum of its proper divisors (37781210488).

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

25688507936 is a wasteful number, since it uses less digits than its factorization.

25688507936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 25688507936 in words is "twenty-five billion, six hundred eighty-eight million, five hundred seven thousand, nine hundred thirty-six".