26012405600 has 72 divisors (see below), whose sum is σ = 63578899440. Its totient is φ = 10392491520.

The previous prime is 26012405533. The next prime is 26012405647. The reversal of 26012405600 is 650421062.

It is a super-2 number, since 2×26012405600² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26012405600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663341 + ... + 701459.

It is an arithmetic number, because the mean of its divisors is an integer number (883040270).

Almost surely, 2^26012405600 is an apocalyptic number.

26012405600 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 26012405600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31789449720).

26012405600 is an abundant number, since it is smaller than the sum of its proper divisors (37566493840).

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

26012405600 is a wasteful number, since it uses less digits than its factorization.

26012405600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38992 (or 38979 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 26012405600 its reverse (650421062), we get a palindrome (26662826662).

The spelling of 26012405600 in words is "twenty-six billion, twelve million, four hundred five thousand, six hundred".