26260012500 has 144 divisors (see below), whose sum is σ = 76869955008. Its totient is φ = 6976800000.

The previous prime is 26260012477. The next prime is 26260012507. The reversal of 26260012500 is 521006262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26260012507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11511360 + ... + 11513640.

It is an arithmetic number, because the mean of its divisors is an integer number (533819132).

Almost surely, 2^26260012500 is an apocalyptic number.

26260012500 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 26260012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38434977504).

26260012500 is an abundant number, since it is smaller than the sum of its proper divisors (50609942508).

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

26260012500 is a wasteful number, since it uses less digits than its factorization.

26260012500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 26260012500 its reverse (521006262), we get a palindrome (26781018762).

The spelling of 26260012500 in words is "twenty-six billion, two hundred sixty million, twelve thousand, five hundred".