40321521340 has 24 divisors (see below), whose sum is σ = 86740445232. Its totient is φ = 15735227520.

The previous prime is 40321521337. The next prime is 40321521341. The reversal of 40321521340 is 4312512304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40321521341) 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 7 ways as a sum of consecutive naturals, for example, 24585474 + ... + 24587113.

It is an arithmetic number, because the mean of its divisors is an integer number (3614185218).

Almost surely, 2^40321521340 is an apocalyptic number.

It is an amenable number.

40321521340 is an abundant number, since it is smaller than the sum of its proper divisors (46418923892).

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

40321521340 is a wasteful number, since it uses less digits than its factorization.

40321521340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49172637 (or 49172635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 40321521340 in words is "forty billion, three hundred twenty-one million, five hundred twenty-one thousand, three hundred forty".