26598779220 has 48 divisors (see below), whose sum is σ = 80205552000. Its totient is φ = 6547391616.

The previous prime is 26598779167. The next prime is 26598779261. The reversal of 26598779220 is 2297789562.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17049720 + ... + 17051279.

It is an arithmetic number, because the mean of its divisors is an integer number (1670949000).

Almost surely, 2^26598779220 is an apocalyptic number.

26598779220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26598779220 is an abundant number, since it is smaller than the sum of its proper divisors (53606772780).

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

26598779220 is a wasteful number, since it uses less digits than its factorization.

26598779220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34101024 (or 34101022 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 26598779220 in words is "twenty-six billion, five hundred ninety-eight million, seven hundred seventy-nine thousand, two hundred twenty".