3942665978945 has 8 divisors (see below), whose sum is σ = 4732939242240. Its totient is φ = 3152972738160.

The previous prime is 3942665978869. The next prime is 3942665978957. The reversal of 3942665978945 is 5498795662493.

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

It is not a de Polignac number, because 3942665978945 - 2²⁸ = 3942397543489 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144990671 + ... + 145017860.

It is an arithmetic number, because the mean of its divisors is an integer number (591617405280).

Almost surely, 2^{3942665978945} is an apocalyptic number.

It is an amenable number.

3942665978945 is a deficient number, since it is larger than the sum of its proper divisors (790273263295).

3942665978945 is a wasteful number, since it uses less digits than its factorization.

3942665978945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290011255.

The product of its digits is 3527193600, while the sum is 77.

The spelling of 3942665978945 in words is "three trillion, nine hundred forty-two billion, six hundred sixty-five million, nine hundred seventy-eight thousand, nine hundred forty-five".