26756731261 has 4 divisors (see below), whose sum is σ = 28814941372. Its totient is φ = 24698521152.

The previous prime is 26756731259. The next prime is 26756731277. The reversal of 26756731261 is 16213765762.

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 11557540036 + 15199191225 = 107506^2 + 123285^2 .

It is a cyclic number.

It is not a de Polignac number, because 26756731261 - 2¹ = 26756731259 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 (26756731061) 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, 1029105036 + ... + 1029105061.

It is an arithmetic number, because the mean of its divisors is an integer number (7203735343).

Almost surely, 2^26756731261 is an apocalyptic number.

It is an amenable number.

26756731261 is a deficient number, since it is larger than the sum of its proper divisors (2058210111).

26756731261 is a wasteful number, since it uses less digits than its factorization.

26756731261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058210110.

The product of its digits is 635040, while the sum is 46.

The spelling of 26756731261 in words is "twenty-six billion, seven hundred fifty-six million, seven hundred thirty-one thousand, two hundred sixty-one".