26993439079 has 4 divisors (see below), whose sum is σ = 26993875480. Its totient is φ = 26993002680.

The previous prime is 26993439049. The next prime is 26993439089. The reversal of 26993439079 is 97093439962.

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 26993439079 - 2¹⁵ = 26993406311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26993439019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106284 + ... + 255505.

It is an arithmetic number, because the mean of its divisors is an integer number (6748468870).

Almost surely, 2^26993439079 is an apocalyptic number.

26993439079 is a deficient number, since it is larger than the sum of its proper divisors (436401).

26993439079 is an equidigital number, since it uses as much as digits as its factorization.

26993439079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436400.

The product of its (nonzero) digits is 19840464, while the sum is 61.

The spelling of 26993439079 in words is "twenty-six billion, nine hundred ninety-three million, four hundred thirty-nine thousand, seventy-nine".