26091171840 has 104 divisors (see below), whose sum is σ = 83481754608. Its totient is φ = 6957629440.

The previous prime is 26091171839. The next prime is 26091171863. The reversal of 26091171840 is 4817119062.

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, 150891 + ... + 273770.

Almost surely, 2^26091171840 is an apocalyptic number.

26091171840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26091171840 is an abundant number, since it is smaller than the sum of its proper divisors (57390582768).

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

26091171840 is an equidigital number, since it uses as much as digits as its factorization.

26091171840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424693 (or 424671 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 26091171840 in words is "twenty-six billion, ninety-one million, one hundred seventy-one thousand, eight hundred forty".