43783720642 has 8 divisors (see below), whose sum is σ = 65681330832. Its totient is φ = 21889943700.

The previous prime is 43783720619. The next prime is 43783720649. The reversal of 43783720642 is 24602738734.

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

It is a junction number, because it is equal to n+sod(n) for n = 43783720592 and 43783720601.

It is not an unprimeable number, because it can be changed into a prime (43783720649) 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 3 ways as a sum of consecutive naturals, for example, 929584 + ... + 975547.

It is an arithmetic number, because the mean of its divisors is an integer number (8210166354).

Almost surely, 2^43783720642 is an apocalyptic number.

43783720642 is a deficient number, since it is larger than the sum of its proper divisors (21897610190).

43783720642 is a wasteful number, since it uses less digits than its factorization.

43783720642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916624.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 43783720642 in words is "forty-three billion, seven hundred eighty-three million, seven hundred twenty thousand, six hundred forty-two".