26417612660 has 24 divisors (see below), whose sum is σ = 55612644360. Its totient is φ = 10541205504.

The previous prime is 26417612653. The next prime is 26417612687. The reversal of 26417612660 is 6621671462.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9991601764 + 16426010896 = 99958^2 + 128164^2 .

It is a congruent number.

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, 1606589 + ... + 1622948.

It is an arithmetic number, because the mean of its divisors is an integer number (2317193515).

Almost surely, 2^26417612660 is an apocalyptic number.

26417612660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26417612660 is an abundant number, since it is smaller than the sum of its proper divisors (29195031700).

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

26417612660 is a wasteful number, since it uses less digits than its factorization.

26417612660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229955 (or 3229953 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 26417612660 in words is "twenty-six billion, four hundred seventeen million, six hundred twelve thousand, six hundred sixty".