26604378320 has 40 divisors (see below), whose sum is σ = 66613272936. Its totient is φ = 9823154688.

The previous prime is 26604378319. The next prime is 26604378329. The reversal of 26604378320 is 2387340662.

It can be written as a sum of positive squares in 4 ways, for example, as 4592501824 + 22011876496 = 67768^2 + 148364^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26604378329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12789527 + ... + 12791606.

Almost surely, 2^26604378320 is an apocalyptic number.

26604378320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26604378320 is an abundant number, since it is smaller than the sum of its proper divisors (40008894616).

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

26604378320 is a wasteful number, since it uses less digits than its factorization.

26604378320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25581159 (or 25581153 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 26604378320 in words is "twenty-six billion, six hundred four million, three hundred seventy-eight thousand, three hundred twenty".