39945168842 has 8 divisors (see below), whose sum is σ = 60314560032. Its totient is φ = 19840315500.

The previous prime is 39945168841. The next prime is 39945168853. The reversal of 39945168842 is 24886154993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (39945168841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66134084 + ... + 66134687.

It is an arithmetic number, because the mean of its divisors is an integer number (7539320004).

Almost surely, 2^39945168842 is an apocalyptic number.

39945168842 is a deficient number, since it is larger than the sum of its proper divisors (20369391190).

39945168842 is a wasteful number, since it uses less digits than its factorization.

39945168842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132268924.

The product of its digits is 14929920, while the sum is 59.

The spelling of 39945168842 in words is "thirty-nine billion, nine hundred forty-five million, one hundred sixty-eight thousand, eight hundred forty-two".