26961372899 has 4 divisors (see below), whose sum is σ = 26961765336. Its totient is φ = 26960980464.

The previous prime is 26961372871. The next prime is 26961372929. The reversal of 26961372899 is 99827316962.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26961372899 - 2¹² = 26961368803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26961372299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63029 + ... + 240614.

It is an arithmetic number, because the mean of its divisors is an integer number (6740441334).

Almost surely, 2^26961372899 is an apocalyptic number.

26961372899 is a deficient number, since it is larger than the sum of its proper divisors (392437).

26961372899 is an equidigital number, since it uses as much as digits as its factorization.

26961372899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392436.

The product of its digits is 17635968, while the sum is 62.

The spelling of 26961372899 in words is "twenty-six billion, nine hundred sixty-one million, three hundred seventy-two thousand, eight hundred ninety-nine".