26121664 has 28 divisors (see below), whose sum is σ = 52692808. Its totient is φ = 12844800.

The previous prime is 26121661. The next prime is 26121671. The reversal of 26121664 is 46612162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26121661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559 + ... + 7249.

It is an arithmetic number, because the mean of its divisors is an integer number (1881886).

Almost surely, 2^26121664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26121664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26346404).

26121664 is an abundant number, since it is smaller than the sum of its proper divisors (26571144).

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

26121664 is an equidigital number, since it uses as much as digits as its factorization.

26121664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764 (or 6754 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 26121664 is about 5110.9357264595. The cubic root of 26121664 is about 296.7109765627.

The spelling of 26121664 in words is "twenty-six million, one hundred twenty-one thousand, six hundred sixty-four".