26639611950 has 144 divisors (see below), whose sum is σ = 78113754864. Its totient is φ = 5989132800.

The previous prime is 26639611939. The next prime is 26639611963. The reversal of 26639611950 is 5911693662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 26639611950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 418642 + ... + 478058.

It is an arithmetic number, because the mean of its divisors is an integer number (542456631).

Almost surely, 2^26639611950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26639611950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39056877432).

26639611950 is an abundant number, since it is smaller than the sum of its proper divisors (51474142914).

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

26639611950 is a wasteful number, since it uses less digits than its factorization.

26639611950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59507 (or 59495 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 26639611950 in words is "twenty-six billion, six hundred thirty-nine million, six hundred eleven thousand, nine hundred fifty".