26744342057 has 4 divisors (see below), whose sum is σ = 27182773956. Its totient is φ = 26305910160.

The previous prime is 26744342021. The next prime is 26744342071. The reversal of 26744342057 is 75024344762.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14859853801 + 11884488256 = 121901^2 + 109016^2 .

It is a cyclic number.

It is not a de Polignac number, because 26744342057 - 2²⁰ = 26743293481 is a prime.

It is a super-4 number, since 4×26744342057⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26744341999 and 26744342017.

It is not an unprimeable number, because it can be changed into a prime (26744342957) 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, 219215858 + ... + 219215979.

It is an arithmetic number, because the mean of its divisors is an integer number (6795693489).

Almost surely, 2^26744342057 is an apocalyptic number.

It is an amenable number.

26744342057 is a deficient number, since it is larger than the sum of its proper divisors (438431899).

26744342057 is an equidigital number, since it uses as much as digits as its factorization.

26744342057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438431898.

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 26744342057 in words is "twenty-six billion, seven hundred forty-four million, three hundred forty-two thousand, fifty-seven".