26946143393 has 4 divisors (see below), whose sum is σ = 29018923668. Its totient is φ = 24873363120.

The previous prime is 26946143377. The next prime is 26946143401. The reversal of 26946143393 is 39334164962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39334164962 = 2 ⋅19667082481.

It can be written as a sum of positive squares in 2 ways, for example, as 1271849569 + 25674293824 = 35663^2 + 160232^2 .

It is a cyclic number.

It is not a de Polignac number, because 26946143393 - 2⁴ = 26946143377 is a prime.

It is a super-2 number, since 2×26946143393² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26946143303) 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, 1036390118 + ... + 1036390143.

It is an arithmetic number, because the mean of its divisors is an integer number (7254730917).

Almost surely, 2^26946143393 is an apocalyptic number.

It is an amenable number.

26946143393 is a deficient number, since it is larger than the sum of its proper divisors (2072780275).

26946143393 is a wasteful number, since it uses less digits than its factorization.

26946143393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072780274.

The product of its digits is 2519424, while the sum is 50.

The spelling of 26946143393 in words is "twenty-six billion, nine hundred forty-six million, one hundred forty-three thousand, three hundred ninety-three".