26871081580 has 144 divisors (see below), whose sum is σ = 69353988480. Its totient is φ = 8705561088.

The previous prime is 26871081577. The next prime is 26871081617. The reversal of 26871081580 is 8518017862.

It is a self number, because there is not a number n which added to its sum of digits gives 26871081580.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1325682 + ... + 1345798.

It is an arithmetic number, because the mean of its divisors is an integer number (481624920).

Almost surely, 2^26871081580 is an apocalyptic number.

26871081580 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 26871081580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34676994240).

26871081580 is an abundant number, since it is smaller than the sum of its proper divisors (42482906900).

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

26871081580 is a wasteful number, since it uses less digits than its factorization.

26871081580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20216 (or 20207 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 26871081580 in words is "twenty-six billion, eight hundred seventy-one million, eighty-one thousand, five hundred eighty".