26405310440664 has 96 divisors (see below), whose sum is σ = 72293366789280. Its totient is φ = 8706095557632.

The previous prime is 26405310440659. The next prime is 26405310440683. The reversal of 26405310440664 is 46604401350462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4238752 + ... + 8412944.

It is an arithmetic number, because the mean of its divisors is an integer number (753055904055).

Almost surely, 2^{26405310440664} is an apocalyptic number.

26405310440664 is a gapful number since it is divisible by the number (24) 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 26405310440664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36146683394640).

26405310440664 is an abundant number, since it is smaller than the sum of its proper divisors (45888056348616).

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

26405310440664 is a wasteful number, since it uses less digits than its factorization.

26405310440664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175161 (or 4175154 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 26405310440664 in words is "twenty-six trillion, four hundred five billion, three hundred ten million, four hundred forty thousand, six hundred sixty-four".