26205473634540 has 96 divisors (see below), whose sum is σ = 74952862838784. Its totient is φ = 6837949635840.

The previous prime is 26205473634523. The next prime is 26205473634563. The reversal of 26205473634540 is 4543637450262.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11934562 + ... + 13958678.

It is an arithmetic number, because the mean of its divisors is an integer number (780758987904).

Almost surely, 2^{26205473634540} is an apocalyptic number.

26205473634540 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 26205473634540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37476431419392).

26205473634540 is an abundant number, since it is smaller than the sum of its proper divisors (48747389204244).

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

26205473634540 is a wasteful number, since it uses less digits than its factorization.

26205473634540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028767 (or 2028765 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 51.

The spelling of 26205473634540 in words is "twenty-six trillion, two hundred five billion, four hundred seventy-three million, six hundred thirty-four thousand, five hundred forty".