40518078867 has 12 divisors (see below), whose sum is σ = 66886987440. Its totient is φ = 23153187888.

The previous prime is 40518078863. The next prime is 40518078889. The reversal of 40518078867 is 76887081504.

It is a happy number.

40518078867 is a `hidden beast` number, since 40 + 518 + 0 + 7 + 8 + 86 + 7 = 666.

It is not a de Polignac number, because 40518078867 - 2² = 40518078863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40518078863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321571992 + ... + 321572117.

It is an arithmetic number, because the mean of its divisors is an integer number (5573915620).

Almost surely, 2^40518078867 is an apocalyptic number.

40518078867 is a deficient number, since it is larger than the sum of its proper divisors (26368908573).

40518078867 is a wasteful number, since it uses less digits than its factorization.

40518078867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643144122 (or 643144119 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 40518078867 in words is "forty billion, five hundred eighteen million, seventy-eight thousand, eight hundred sixty-seven".