26551665210 has 128 divisors (see below), whose sum is σ = 73548103680. Its totient is φ = 6009099264.

The previous prime is 26551665191. The next prime is 26551665251. The reversal of 26551665210 is 1256615562.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26056081 + ... + 26057099.

It is an arithmetic number, because the mean of its divisors is an integer number (574594560).

Almost surely, 2^26551665210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26551665210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36774051840).

26551665210 is an abundant number, since it is smaller than the sum of its proper divisors (46996438470).

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

26551665210 is a wasteful number, since it uses less digits than its factorization.

26551665210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 26551665210 in words is "twenty-six billion, five hundred fifty-one million, six hundred sixty-five thousand, two hundred ten".