26676686728 has 16 divisors (see below), whose sum is σ = 50092680780. Its totient is φ = 13318638528.

The previous prime is 26676686723. The next prime is 26676686731. The reversal of 26676686728 is 82768667662.

It can be written as a sum of positive squares in 2 ways, for example, as 17624686564 + 9052000164 = 132758^2 + 95142^2 .

It is a super-2 number, since 2×26676686728² (a number of 22 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 26676686728.

It is not an unprimeable number, because it can be changed into a prime (26676686723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2457351 + ... + 2468182.

Almost surely, 2^26676686728 is an apocalyptic number.

It is an amenable number.

26676686728 is a deficient number, since it is larger than the sum of its proper divisors (23415994052).

26676686728 is a wasteful number, since it uses less digits than its factorization.

26676686728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926216 (or 4926212 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 64.

The spelling of 26676686728 in words is "twenty-six billion, six hundred seventy-six million, six hundred eighty-six thousand, seven hundred twenty-eight".