39949618212 has 144 divisors (see below), whose sum is σ = 119846668032. Its totient is φ = 10983029760.

The previous prime is 39949618201. The next prime is 39949618223. The reversal of 39949618212 is 21281694993.

39949618212 is a `hidden beast` number, since 3 + 9 + 9 + 4 + 9 + 618 + 2 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (39949618201) and next prime (39949618223).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 727753 + ... + 780719.

It is an arithmetic number, because the mean of its divisors is an integer number (832268528).

Almost surely, 2^39949618212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39949618212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59923334016).

39949618212 is an abundant number, since it is smaller than the sum of its proper divisors (79897049820).

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

39949618212 is a wasteful number, since it uses less digits than its factorization.

39949618212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53098 (or 53093 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 39949618212 in words is "thirty-nine billion, nine hundred forty-nine million, six hundred eighteen thousand, two hundred twelve".