25788602500 has 60 divisors (see below), whose sum is σ = 56484453564. Its totient is φ = 10298992000.

The previous prime is 25788602461. The next prime is 25788602507. The reversal of 25788602500 is 520688752.

It can be written as a sum of positive squares in 10 ways, for example, as 20302830144 + 5485772356 = 142488^2 + 74066^2 .

It is not an unprimeable number, because it can be changed into a prime (25788602507) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1624602 + ... + 1640398.

Almost surely, 2^25788602500 is an apocalyptic number.

25788602500 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 25788602500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28242226782).

25788602500 is an abundant number, since it is smaller than the sum of its proper divisors (30695851064).

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

25788602500 is a wasteful number, since it uses less digits than its factorization.

25788602500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16474 (or 16457 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 25788602500 in words is "twenty-five billion, seven hundred eighty-eight million, six hundred two thousand, five hundred".