39439618168 has 8 divisors (see below), whose sum is σ = 73949284080. Its totient is φ = 19719809080.

The previous prime is 39439618159. The next prime is 39439618171. The reversal of 39439618168 is 86181693493.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2464976128 + ... + 2464976143.

It is an arithmetic number, because the mean of its divisors is an integer number (9243660510).

Almost surely, 2^39439618168 is an apocalyptic number.

It is an amenable number.

39439618168 is a deficient number, since it is larger than the sum of its proper divisors (34509665912).

39439618168 is a wasteful number, since it uses less digits than its factorization.

39439618168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929952277 (or 4929952273 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 58.

The spelling of 39439618168 in words is "thirty-nine billion, four hundred thirty-nine million, six hundred eighteen thousand, one hundred sixty-eight".