39945504012 has 96 divisors (see below), whose sum is σ = 102518169600. Its totient is φ = 12049342272.

The previous prime is 39945504007. The next prime is 39945504023. The reversal of 39945504012 is 21040554993.

It is a super-2 number, since 2×39945504012² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4122189 + ... + 4131867.

It is an arithmetic number, because the mean of its divisors is an integer number (1067897600).

Almost surely, 2^39945504012 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 39945504012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51259084800).

39945504012 is an abundant number, since it is smaller than the sum of its proper divisors (62572665588).

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

39945504012 is a wasteful number, since it uses less digits than its factorization.

39945504012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515 (or 10513 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 39945504012 in words is "thirty-nine billion, nine hundred forty-five million, five hundred four thousand, twelve".