39394906912 has 12 divisors (see below), whose sum is σ = 77558723046. Its totient is φ = 19697453440.

The previous prime is 39394906909. The next prime is 39394906921. The reversal of 39394906912 is 21960949393.

It can be written as a sum of positive squares in only one way, i.e., 22381356816 + 17013550096 = 149604^2 + 130436^2 .

It is a super-3 number, since 3×39394906912³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615545389 + ... + 615545452.

Almost surely, 2^39394906912 is an apocalyptic number.

39394906912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39394906912 is a deficient number, since it is larger than the sum of its proper divisors (38163816134).

39394906912 is a wasteful number, since it uses less digits than its factorization.

39394906912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231090851 (or 1231090843 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 55.

The spelling of 39394906912 in words is "thirty-nine billion, three hundred ninety-four million, nine hundred six thousand, nine hundred twelve".