39855844668 has 24 divisors (see below), whose sum is σ = 93086506240. Its totient is φ = 13272490800.

The previous prime is 39855844643. The next prime is 39855844673. The reversal of 39855844668 is 86644855893.

It is a junction number, because it is equal to n+sod(n) for n = 39855844599 and 39855844608.

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, 1585858 + ... + 1610793.

Almost surely, 2^39855844668 is an apocalyptic number.

It is an amenable number.

39855844668 is an abundant number, since it is smaller than the sum of its proper divisors (53230661572).

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

39855844668 is a wasteful number, since it uses less digits than its factorization.

39855844668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197697 (or 3197695 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 66.

The spelling of 39855844668 in words is "thirty-nine billion, eight hundred fifty-five million, eight hundred forty-four thousand, six hundred sixty-eight".