26424893664 has 72 divisors (see below), whose sum is σ = 80926248312. Its totient is φ = 8130735360.

The previous prime is 26424893657. The next prime is 26424893681. The reversal of 26424893664 is 46639842462.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 26424893664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3525222 + ... + 3532709.

It is an arithmetic number, because the mean of its divisors is an integer number (1123975671).

Almost surely, 2^26424893664 is an apocalyptic number.

26424893664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26424893664 is an abundant number, since it is smaller than the sum of its proper divisors (54501354648).

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

26424893664 is a wasteful number, since it uses less digits than its factorization.

26424893664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7057960 (or 7057949 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 54.

The spelling of 26424893664 in words is "twenty-six billion, four hundred twenty-four million, eight hundred ninety-three thousand, six hundred sixty-four".