39439852136 has 8 divisors (see below), whose sum is σ = 73949722770. Its totient is φ = 19719926064.

The previous prime is 39439852121. The next prime is 39439852141. The reversal of 39439852136 is 63125893493.

It can be written as a sum of positive squares in only one way, i.e., 22202788036 + 17237064100 = 149006^2 + 131290^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2464990751 + ... + 2464990766.

Almost surely, 2^39439852136 is an apocalyptic number.

It is an amenable number.

39439852136 is a deficient number, since it is larger than the sum of its proper divisors (34509870634).

39439852136 is a wasteful number, since it uses less digits than its factorization.

39439852136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929981523 (or 4929981519 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 53.

The spelling of 39439852136 in words is "thirty-nine billion, four hundred thirty-nine million, eight hundred fifty-two thousand, one hundred thirty-six".