39649169936 has 10 divisors (see below), whose sum is σ = 76820266782. Its totient is φ = 19824584960.

The previous prime is 39649169909. The next prime is 39649169951. The reversal of 39649169936 is 63996194693.

It can be written as a sum of positive squares in only one way, i.e., 34894240000 + 4754929936 = 186800^2 + 68956^2 .

It is a super-2 number, since 2×39649169936² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239036545 + ... + 1239036576.

Almost surely, 2^39649169936 is an apocalyptic number.

It is an amenable number.

39649169936 is a deficient number, since it is larger than the sum of its proper divisors (37171096846).

39649169936 is a wasteful number, since it uses less digits than its factorization.

39649169936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478073129 (or 2478073123 counting only the distinct ones).

The product of its digits is 51018336, while the sum is 65.

The spelling of 39649169936 in words is "thirty-nine billion, six hundred forty-nine million, one hundred sixty-nine thousand, nine hundred thirty-six".