40231660212 has 72 divisors (see below), whose sum is σ = 105355472040. Its totient is φ = 12929414400.

The previous prime is 40231660207. The next prime is 40231660213. The reversal of 40231660212 is 21206613204.

40231660212 is a `hidden beast` number, since 40 + 2 + 3 + 1 + 6 + 602 + 12 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11682151056 + 28549509156 = 108084^2 + 168966^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231660213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 704358 + ... + 759330.

It is an arithmetic number, because the mean of its divisors is an integer number (1463270445).

Almost surely, 2^40231660212 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 40231660212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52677736020).

40231660212 is an abundant number, since it is smaller than the sum of its proper divisors (65123811828).

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

40231660212 is a wasteful number, since it uses less digits than its factorization.

40231660212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55713 (or 55708 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 40231660212 in words is "forty billion, two hundred thirty-one million, six hundred sixty thousand, two hundred twelve".