26635691012 has 12 divisors (see below), whose sum is σ = 53271382080. Its totient is φ = 11415296136.

The previous prime is 26635691011. The next prime is 26635691021. The reversal of 26635691012 is 21019653662.

26635691012 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (26635691011) 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, 475637312 + ... + 475637367.

It is an arithmetic number, because the mean of its divisors is an integer number (4439281840).

Almost surely, 2^26635691012 is an apocalyptic number.

It is an amenable number.

26635691012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26635691012 is a wasteful number, since it uses less digits than its factorization.

26635691012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951274690 (or 951274688 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 26635691012 in words is "twenty-six billion, six hundred thirty-five million, six hundred ninety-one thousand, twelve".