26561337222020 has 48 divisors (see below), whose sum is σ = 57503211555888. Its totient is φ = 10299378186240.

The previous prime is 26561337222011. The next prime is 26561337222029. The reversal of 26561337222020 is 2022273316562.

It is an interprime number because it is at equal distance from previous prime (26561337222011) and next prime (26561337222029).

It can be written as a sum of positive squares in 8 ways, for example, as 158162108416 + 26403175113604 = 397696^2 + 5138402^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (26561337222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103030097 + ... + 103287576.

It is an arithmetic number, because the mean of its divisors is an integer number (1197983574081).

Almost surely, 2^{26561337222020} is an apocalyptic number.

26561337222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26561337222020 is an abundant number, since it is smaller than the sum of its proper divisors (30941874333868).

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

26561337222020 is a wasteful number, since it uses less digits than its factorization.

26561337222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206317880 (or 206317878 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 26561337222020 in words is "twenty-six trillion, five hundred sixty-one billion, three hundred thirty-seven million, two hundred twenty-two thousand, twenty".