26260860820 has 24 divisors (see below), whose sum is σ = 56188334664. Its totient is φ = 10306148736.

The previous prime is 26260860803. The next prime is 26260860853. The reversal of 26260860820 is 2806806262.

It can be written as a sum of positive squares in 4 ways, for example, as 3668967184 + 22591893636 = 60572^2 + 150306^2 .

It is a super-2 number, since 2×26260860820² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12386139 + ... + 12388258.

It is an arithmetic number, because the mean of its divisors is an integer number (2341180611).

Almost surely, 2^26260860820 is an apocalyptic number.

26260860820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26260860820 is an abundant number, since it is smaller than the sum of its proper divisors (29927473844).

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

26260860820 is a wasteful number, since it uses less digits than its factorization.

26260860820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24774459 (or 24774457 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 26260860820 in words is "twenty-six billion, two hundred sixty million, eight hundred sixty thousand, eight hundred twenty".