26297454580820 has 18 divisors (see below), whose sum is σ = 55224702780282. Its totient is φ = 10518972658896.

The previous prime is 26297454580757. The next prime is 26297454580867. The reversal of 26297454580820 is 2808545479262.

It can be written as a sum of positive squares in only one way, i.e., 21037963664656 + 5259490916164 = 4586716^2 + 2293358^2 .

It is a super-2 number, since 2×26297454580820² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22360241 + ... + 23506919.

It is an arithmetic number, because the mean of its divisors is an integer number (3068039043349).

Almost surely, 2^{26297454580820} is an apocalyptic number.

26297454580820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26297454580820 is an abundant number, since it is smaller than the sum of its proper divisors (28927248199462).

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

26297454580820 is an frugal number, since it uses more digits than its factorization.

26297454580820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293367 (or 1146686 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 62.

The spelling of 26297454580820 in words is "twenty-six trillion, two hundred ninety-seven billion, four hundred fifty-four million, five hundred eighty thousand, eight hundred twenty".