26686056538 has 16 divisors (see below), whose sum is σ = 41060194560. Its totient is φ = 13000843296.

The previous prime is 26686056533. The next prime is 26686056569. The reversal of 26686056538 is 83565068662.

It is a super-2 number, since 2×26686056538² (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 7 ways as a sum of consecutive naturals, for example, 344170 + ... + 414517.

It is an arithmetic number, because the mean of its divisors is an integer number (2566262160).

Almost surely, 2^26686056538 is an apocalyptic number.

26686056538 is a deficient number, since it is larger than the sum of its proper divisors (14374138022).

26686056538 is a wasteful number, since it uses less digits than its factorization.

26686056538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759141.

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 26686056538 in words is "twenty-six billion, six hundred eighty-six million, fifty-six thousand, five hundred thirty-eight".