39642689855 has 8 divisors (see below), whose sum is σ = 47573518752. Its totient is φ = 31712624608.

The previous prime is 39642689819. The next prime is 39642689873. The reversal of 39642689855 is 55898624693.

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 39642689855 - 2⁶ = 39642689791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39642689791 and 39642689800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69707 + ... + 290076.

It is an arithmetic number, because the mean of its divisors is an integer number (5946689844).

Almost surely, 2^39642689855 is an apocalyptic number.

39642689855 is a deficient number, since it is larger than the sum of its proper divisors (7930828897).

39642689855 is a wasteful number, since it uses less digits than its factorization.

39642689855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381825.

The product of its digits is 111974400, while the sum is 65.

The spelling of 39642689855 in words is "thirty-nine billion, six hundred forty-two million, six hundred eighty-nine thousand, eight hundred fifty-five".