11726405736 has 64 divisors (see below), whose sum is σ = 30306830400. Its totient is φ = 3778444800.

The previous prime is 11726405723. The next prime is 11726405737. The reversal of 11726405736 is 63750462711.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11726405737) 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, 52591 + ... + 161921.

It is an arithmetic number, because the mean of its divisors is an integer number (473544225).

Almost surely, 2^11726405736 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 11726405736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15153415200).

11726405736 is an abundant number, since it is smaller than the sum of its proper divisors (18580424664).

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

11726405736 is a wasteful number, since it uses less digits than its factorization.

11726405736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109490 (or 109486 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 11726405736 in words is "eleven billion, seven hundred twenty-six million, four hundred five thousand, seven hundred thirty-six".