40520426818 has 8 divisors (see below), whose sum is σ = 61217911440. Its totient is φ = 20114456340.

The previous prime is 40520426809. The next prime is 40520426839. The reversal of 40520426818 is 81862402504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72878188 + ... + 72878743.

It is an arithmetic number, because the mean of its divisors is an integer number (7652238930).

Almost surely, 2^40520426818 is an apocalyptic number.

40520426818 is a deficient number, since it is larger than the sum of its proper divisors (20697484622).

40520426818 is a wasteful number, since it uses less digits than its factorization.

40520426818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145757072.

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 40520426818 in words is "forty billion, five hundred twenty million, four hundred twenty-six thousand, eight hundred eighteen".