26404345660 has 96 divisors (see below), whose sum is σ = 69238632960. Its totient is φ = 8217158400.

The previous prime is 26404345613. The next prime is 26404345679. The reversal of 26404345660 is 6654340462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1004971 + ... + 1030909.

It is an arithmetic number, because the mean of its divisors is an integer number (721235760).

Almost surely, 2^26404345660 is an apocalyptic number.

26404345660 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 26404345660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34619316480).

26404345660 is an abundant number, since it is smaller than the sum of its proper divisors (42834287300).

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

26404345660 is a wasteful number, since it uses less digits than its factorization.

26404345660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26627 (or 26625 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 26404345660 in words is "twenty-six billion, four hundred four million, three hundred forty-five thousand, six hundred sixty".