26961280321 has 8 divisors (see below), whose sum is σ = 27027098280. Its totient is φ = 26895525888.

The previous prime is 26961280319. The next prime is 26961280337. The reversal of 26961280321 is 12308216962.

It can be written as a sum of positive squares in 4 ways, for example, as 504631296 + 26456649025 = 22464^2 + 162655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26961280321 - 2¹ = 26961280319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26961280301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897025 + ... + 926593.

It is an arithmetic number, because the mean of its divisors is an integer number (3378387285).

Almost surely, 2^26961280321 is an apocalyptic number.

It is an amenable number.

26961280321 is a deficient number, since it is larger than the sum of its proper divisors (65817959).

26961280321 is a wasteful number, since it uses less digits than its factorization.

26961280321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31763.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 26961280321 in words is "twenty-six billion, nine hundred sixty-one million, two hundred eighty thousand, three hundred twenty-one".