26931164221979 has 8 divisors (see below), whose sum is σ = 27202710307008. Its totient is φ = 26660884086720.

The previous prime is 26931164221963. The next prime is 26931164221981. The reversal of 26931164221979 is 97912246113962.

It is a happy number.

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 26931164221979 - 2⁴ = 26931164221963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26931164221939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316444682 + ... + 316529775.

It is an arithmetic number, because the mean of its divisors is an integer number (3400338788376).

Almost surely, 2^{26931164221979} is an apocalyptic number.

26931164221979 is a deficient number, since it is larger than the sum of its proper divisors (271546085029).

26931164221979 is a wasteful number, since it uses less digits than its factorization.

26931164221979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632974885.

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

The spelling of 26931164221979 in words is "twenty-six trillion, nine hundred thirty-one billion, one hundred sixty-four million, two hundred twenty-one thousand, nine hundred seventy-nine".