26440222660 has 12 divisors (see below), whose sum is σ = 55524467628. Its totient is φ = 10576089056.

The previous prime is 26440222649. The next prime is 26440222717. The reversal of 26440222660 is 6622204462.

It can be written as a sum of positive squares in 2 ways, for example, as 15667028224 + 10773194436 = 125168^2 + 103794^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661005547 + ... + 661005586.

It is an arithmetic number, because the mean of its divisors is an integer number (4627038969).

Almost surely, 2^26440222660 is an apocalyptic number.

26440222660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26440222660 is an abundant number, since it is smaller than the sum of its proper divisors (29084244968).

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

26440222660 is a wasteful number, since it uses less digits than its factorization.

26440222660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322011142 (or 1322011140 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 26440222660 in words is "twenty-six billion, four hundred forty million, two hundred twenty-two thousand, six hundred sixty".