40722181218 has 40 divisors (see below), whose sum is σ = 91366787820. Its totient is φ = 13556367360.

The previous prime is 40722181217. The next prime is 40722181223. The reversal of 40722181218 is 81218122704.

It is a happy number.

40722181218 is a `hidden beast` number, since 407 + 22 + 18 + 1 + 218 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40074834969 + 647346249 = 200187^2 + 25443^2 .

It is not an unprimeable number, because it can be changed into a prime (40722181217) 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 19 ways as a sum of consecutive naturals, for example, 38863 + ... + 288018.

Almost surely, 2^40722181218 is an apocalyptic number.

40722181218 is an abundant number, since it is smaller than the sum of its proper divisors (50644606602).

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

40722181218 is a wasteful number, since it uses less digits than its factorization.

40722181218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327664 (or 327655 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The spelling of 40722181218 in words is "forty billion, seven hundred twenty-two million, one hundred eighty-one thousand, two hundred eighteen".