26161009281 has 12 divisors (see below), whose sum is σ = 41223408720. Its totient is φ = 15855157080.

The previous prime is 26161009279. The next prime is 26161009331. The reversal of 26161009281 is 18290016162.

26161009281 is a `hidden beast` number, since 2 + 616 + 10 + 0 + 9 + 28 + 1 = 666.

It is not a de Polignac number, because 26161009281 - 2¹ = 26161009279 is a prime.

It is a super-2 number, since 2×26161009281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26161009241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132126211 + ... + 132126408.

It is an arithmetic number, because the mean of its divisors is an integer number (3435284060).

Almost surely, 2^26161009281 is an apocalyptic number.

It is an amenable number.

26161009281 is a deficient number, since it is larger than the sum of its proper divisors (15062399439).

26161009281 is a wasteful number, since it uses less digits than its factorization.

26161009281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264252636 (or 264252633 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 26161009281 in words is "twenty-six billion, one hundred sixty-one million, nine thousand, two hundred eighty-one".