40394661424 has 20 divisors (see below), whose sum is σ = 84285015136. Its totient is φ = 18643689792.

The previous prime is 40394661397. The next prime is 40394661431. The reversal of 40394661424 is 42416649304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97102344 + ... + 97102759.

Almost surely, 2^40394661424 is an apocalyptic number.

It is an amenable number.

40394661424 is an abundant number, since it is smaller than the sum of its proper divisors (43890353712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40394661424 is a wasteful number, since it uses less digits than its factorization.

40394661424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194205124 (or 194205118 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 40394661424 in words is "forty billion, three hundred ninety-four million, six hundred sixty-one thousand, four hundred twenty-four".