26771831641 has 3 divisors (see below), whose sum is σ = 26771995263. Its totient is φ = 26771668020.

The previous prime is 26771831599. The next prime is 26771831683. The reversal of 26771831641 is 14613817762.

The square root of 26771831641 is 163621.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (26771831599) and next prime (26771831683).

It can be written as a sum of positive squares in only one way, i.e., 1127012041 + 25644819600 = 33571^2 + 160140^2 .

It is not a de Polignac number, because 26771831641 - 2¹⁵ = 26771798873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26771831591 and 26771831600.

It is not an unprimeable number, because it can be changed into a prime (26771331641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81811 + ... + 245431.

It is an arithmetic number, because the mean of its divisors is an integer number (8923998421).

Almost surely, 2^26771831641 is an apocalyptic number.

26771831641 is the 163621-st square number.

26771831641 is the 81811-st centered octagonal number.

It is an amenable number.

26771831641 is a deficient number, since it is larger than the sum of its proper divisors (163622).

26771831641 is an frugal number, since it uses more digits than its factorization.

26771831641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327242 (or 163621 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 26771831641 in words is "twenty-six billion, seven hundred seventy-one million, eight hundred thirty-one thousand, six hundred forty-one".