26942267881 has 27 divisors (see below), whose sum is σ = 29160436599. Its totient is φ = 24889028112.

The previous prime is 26942267819. The next prime is 26942267893. The reversal of 26942267881 is 18876224962.

The square root of 26942267881 is 164141.

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

It can be written as a sum of positive squares in only one way, i.e., 19422603225 + 7519664656 = 139365^2 + 86716^2 .

It is not a de Polignac number, because 26942267881 - 2¹³ = 26942259689 is a prime.

It is a super-2 number, since 2×26942267881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26942267801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 165289906 + ... + 165290068.

Almost surely, 2^26942267881 is an apocalyptic number.

26942267881 is the 164141-st square number.

26942267881 is the 82071-st centered octagonal number.

It is an amenable number.

26942267881 is a deficient number, since it is larger than the sum of its proper divisors (2218168718).

26942267881 is an frugal number, since it uses more digits than its factorization.

26942267881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 235 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The spelling of 26942267881 in words is "twenty-six billion, nine hundred forty-two million, two hundred sixty-seven thousand, eight hundred eighty-one".