26161621752 has 192 divisors, whose sum is σ = 78943312800. Its totient is φ = 7195238400.

The previous prime is 26161621747. The next prime is 26161621753. The reversal of 26161621752 is 25712616162.

It is a self number, because there is not a number n which added to its sum of digits gives 26161621752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26161621753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13674748 + ... + 13676660.

Almost surely, 2^26161621752 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 26161621752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39471656400).

26161621752 is an abundant number, since it is smaller than the sum of its proper divisors (52781691048).

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

26161621752 is a wasteful number, since it uses less digits than its factorization.

26161621752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2355 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The spelling of 26161621752 in words is "twenty-six billion, one hundred sixty-one million, six hundred twenty-one thousand, seven hundred fifty-two".