40643618373 has 16 divisors (see below), whose sum is σ = 60217955200. Its totient is φ = 27093411360.

The previous prime is 40643618369. The next prime is 40643618423. The reversal of 40643618373 is 37381634604.

40643618373 is a `hidden beast` number, since 406 + 43 + 61 + 83 + 73 = 666.

It is not a de Polignac number, because 40643618373 - 2² = 40643618369 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643618303) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 289608 + ... + 406398.

It is an arithmetic number, because the mean of its divisors is an integer number (3763622200).

Almost surely, 2^40643618373 is an apocalyptic number.

It is an amenable number.

40643618373 is a deficient number, since it is larger than the sum of its proper divisors (19574336827).

40643618373 is a wasteful number, since it uses less digits than its factorization.

40643618373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129689 (or 129683 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 40643618373 in words is "forty billion, six hundred forty-three million, six hundred eighteen thousand, three hundred seventy-three".