39942372147 has 16 divisors (see below), whose sum is σ = 56066363520. Its totient is φ = 25223659200.

The previous prime is 39942372143. The next prime is 39942372161. The reversal of 39942372147 is 74127324993.

It is a happy number.

It is not a de Polignac number, because 39942372147 - 2² = 39942372143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39942372147.

It is not an unprimeable number, because it can be changed into a prime (39942372143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479647 + ... + 556727.

It is an arithmetic number, because the mean of its divisors is an integer number (3504147720).

Almost surely, 2^39942372147 is an apocalyptic number.

39942372147 is a deficient number, since it is larger than the sum of its proper divisors (16123991373).

39942372147 is a wasteful number, since it uses less digits than its factorization.

39942372147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86194.

The product of its digits is 2286144, while the sum is 51.

The spelling of 39942372147 in words is "thirty-nine billion, nine hundred forty-two million, three hundred seventy-two thousand, one hundred forty-seven".