26686056537 has 24 divisors (see below), whose sum is σ = 44799842880. Its totient is φ = 14990712480.

The previous prime is 26686056533. The next prime is 26686056569. The reversal of 26686056537 is 73565068662.

It is a happy number.

26686056537 is a `hidden beast` number, since 26 + 6 + 8 + 605 + 6 + 5 + 3 + 7 = 666.

It is not a de Polignac number, because 26686056537 - 2² = 26686056533 is a prime.

It is a super-2 number, since 2×26686056537² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26686056533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3586014 + ... + 3593447.

It is an arithmetic number, because the mean of its divisors is an integer number (1866660120).

Almost surely, 2^26686056537 is an apocalyptic number.

It is an amenable number.

26686056537 is a deficient number, since it is larger than the sum of its proper divisors (18113786343).

26686056537 is a wasteful number, since it uses less digits than its factorization.

26686056537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179533 (or 7179530 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 26686056537 in words is "twenty-six billion, six hundred eighty-six million, fifty-six thousand, five hundred thirty-seven".