40218387613 has 8 divisors (see below), whose sum is σ = 41308565760. Its totient is φ = 39128377680.

The previous prime is 40218387611. The next prime is 40218387623. The reversal of 40218387613 is 31678381204.

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

It is a cyclic number.

It is not a de Polignac number, because 40218387613 - 2¹ = 40218387611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40218387613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40218387611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556428 + ... + 624538.

It is an arithmetic number, because the mean of its divisors is an integer number (5163570720).

Almost surely, 2^40218387613 is an apocalyptic number.

It is an amenable number.

40218387613 is a deficient number, since it is larger than the sum of its proper divisors (1090178147).

40218387613 is a wasteful number, since it uses less digits than its factorization.

40218387613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84107.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 40218387613 in words is "forty billion, two hundred eighteen million, three hundred eighty-seven thousand, six hundred thirteen".