40644012336 has 80 divisors (see below), whose sum is σ = 110964147840. Its totient is φ = 12783744000.

The previous prime is 40644012289. The next prime is 40644012359. The reversal of 40644012336 is 63321044604.

It is a junction number, because it is equal to n+sod(n) for n = 40644012297 and 40644012306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140136 + ... + 317688.

It is an arithmetic number, because the mean of its divisors is an integer number (1387051848).

Almost surely, 2^40644012336 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 40644012336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55482073920).

40644012336 is an abundant number, since it is smaller than the sum of its proper divisors (70320135504).

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

40644012336 is a wasteful number, since it uses less digits than its factorization.

40644012336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177834 (or 177828 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The spelling of 40644012336 in words is "forty billion, six hundred forty-four million, twelve thousand, three hundred thirty-six".