40518128650238 has 4 divisors (see below), whose sum is σ = 60777192975360. Its totient is φ = 20259064325118.

The previous prime is 40518128650231. The next prime is 40518128650247. The reversal of 40518128650238 is 83205682181504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40518128650238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40518128650231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10129532162558 + ... + 10129532162561.

It is an arithmetic number, because the mean of its divisors is an integer number (15194298243840).

Almost surely, 2^{40518128650238} is an apocalyptic number.

40518128650238 is a deficient number, since it is larger than the sum of its proper divisors (20259064325122).

40518128650238 is a wasteful number, since it uses less digits than its factorization.

40518128650238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20259064325121.

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 40518128650238 in words is "forty trillion, five hundred eighteen billion, one hundred twenty-eight million, six hundred fifty thousand, two hundred thirty-eight".