40013433344 has 80 divisors (see below), whose sum is σ = 84323189280. Its totient is φ = 18916208640.

The previous prime is 40013433337. The next prime is 40013433349. The reversal of 40013433344 is 44333431004.

It is not an unprimeable number, because it can be changed into a prime (40013433349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5259047 + ... + 5266649.

It is an arithmetic number, because the mean of its divisors is an integer number (1054039866).

Almost surely, 2^40013433344 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 40013433344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42161594640).

40013433344 is an abundant number, since it is smaller than the sum of its proper divisors (44309755936).

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

40013433344 is an equidigital number, since it uses as much as digits as its factorization.

40013433344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8181 (or 8165 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 40013433344 its reverse (44333431004), we get a palindrome (84346864348).

The spelling of 40013433344 in words is "forty billion, thirteen million, four hundred thirty-three thousand, three hundred forty-four".