26657800728 has 64 divisors (see below), whose sum is σ = 71799420000. Its totient is φ = 8199152640.

The previous prime is 26657800723. The next prime is 26657800751. The reversal of 26657800728 is 82700875662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26657800723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842148 + ... + 873228.

Almost surely, 2^26657800728 is an apocalyptic number.

It is an amenable number.

26657800728 is an abundant number, since it is smaller than the sum of its proper divisors (45141619272).

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

26657800728 is a wasteful number, since it uses less digits than its factorization.

26657800728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33852 (or 33848 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 26657800728 in words is "twenty-six billion, six hundred fifty-seven million, eight hundred thousand, seven hundred twenty-eight".