26649019008 has 128 divisors (see below), whose sum is σ = 78708504000. Its totient is φ = 8876583936.

The previous prime is 26649019003. The next prime is 26649019027. The reversal of 26649019008 is 80091094662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (26649019003) 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, 8773266 + ... + 8776302.

Almost surely, 2^26649019008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26649019008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39354252000).

26649019008 is an abundant number, since it is smaller than the sum of its proper divisors (52059484992).

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

26649019008 is a wasteful number, since it uses less digits than its factorization.

26649019008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5581 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 26649019008 in words is "twenty-six billion, six hundred forty-nine million, nineteen thousand, eight".