40318668431 has 4 divisors (see below), whose sum is σ = 40320705264. Its totient is φ = 40316631600.

The previous prime is 40318668427. The next prime is 40318668463. The reversal of 40318668431 is 13486681304.

40318668431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40318668431 - 2² = 40318668427 is a prime.

It is a super-3 number, since 3×40318668431³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40318668331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988430 + ... + 1028411.

It is an arithmetic number, because the mean of its divisors is an integer number (10080176316).

Almost surely, 2^40318668431 is an apocalyptic number.

40318668431 is a deficient number, since it is larger than the sum of its proper divisors (2036833).

40318668431 is a wasteful number, since it uses less digits than its factorization.

40318668431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036832.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 40318668431 in words is "forty billion, three hundred eighteen million, six hundred sixty-eight thousand, four hundred thirty-one".