26500645616 has 20 divisors (see below), whose sum is σ = 53001292224. Its totient is φ = 12822892800.

The previous prime is 26500645579. The next prime is 26500645631. The reversal of 26500645616 is 61654600562.

26500645616 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26713865 + ... + 26714856.

Almost surely, 2^26500645616 is an apocalyptic number.

It is an amenable number.

26500645616 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.

26500645616 is a wasteful number, since it uses less digits than its factorization.

26500645616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53428760 (or 53428754 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 26500645616 in words is "twenty-six billion, five hundred million, six hundred forty-five thousand, six hundred sixteen".