26921784839 has 2 divisors, whose sum is σ = 26921784840. Its totient is φ = 26921784838.

The previous prime is 26921784821. The next prime is 26921784871. The reversal of 26921784839 is 93848712962.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26921784839 - 2²⁸ = 26653349383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26921784889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13460892419 + 13460892420.

It is an arithmetic number, because the mean of its divisors is an integer number (13460892420).

Almost surely, 2^26921784839 is an apocalyptic number.

26921784839 is a deficient number, since it is larger than the sum of its proper divisors (1).

26921784839 is an equidigital number, since it uses as much as digits as its factorization.

26921784839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The spelling of 26921784839 in words is "twenty-six billion, nine hundred twenty-one million, seven hundred eighty-four thousand, eight hundred thirty-nine".