26869615655281 has 9 divisors (see below), whose sum is σ = 31256533889931. Its totient is φ = 23031068031552.

The previous prime is 26869615655269. The next prime is 26869615655287. The reversal of 26869615655281 is 18255651696862.

The square root of 26869615655281 is 5183591.

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., 23620912218225 + 3248703437056 = 4860135^2 + 1802416^2 .

It is not a de Polignac number, because 26869615655281 - 2¹⁹ = 26869615130993 is a prime.

It is a super-2 number, since 2×26869615655281² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26869615655281.

It is not an unprimeable number, because it can be changed into a prime (26869615655287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35914881 + ... + 36655393.

Almost surely, 2^{26869615655281} is an apocalyptic number.

26869615655281 is the 5183591-st square number.

26869615655281 is the 2591796-th centered octagonal number.

It is an amenable number.

26869615655281 is a deficient number, since it is larger than the sum of its proper divisors (4386918234650).

26869615655281 is an frugal number, since it uses more digits than its factorization.

26869615655281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481040 (or 740520 counting only the distinct ones).

The product of its digits is 373248000, while the sum is 70.

The spelling of 26869615655281 in words is "twenty-six trillion, eight hundred sixty-nine billion, six hundred fifteen million, six hundred fifty-five thousand, two hundred eighty-one".