40081521368 has 96 divisors (see below), whose sum is σ = 88648862400. Its totient is φ = 16937702208.

The previous prime is 40081521349. The next prime is 40081521371. The reversal of 40081521368 is 86312518004.

40081521368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24043271 + ... + 24044937.

It is an arithmetic number, because the mean of its divisors is an integer number (923425650).

Almost surely, 2^40081521368 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 40081521368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44324431200).

40081521368 is an abundant number, since it is smaller than the sum of its proper divisors (48567341032).

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

40081521368 is a wasteful number, since it uses less digits than its factorization.

40081521368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 40081521368 in words is "forty billion, eighty-one million, five hundred twenty-one thousand, three hundred sixty-eight".