39639974242 has 16 divisors (see below), whose sum is σ = 64885918464. Its totient is φ = 18012474000.

The previous prime is 39639974203. The next prime is 39639974249. The reversal of 39639974242 is 24247993693.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39639974249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213234 + ... + 353197.

It is an arithmetic number, because the mean of its divisors is an integer number (4055369904).

Almost surely, 2^39639974242 is an apocalyptic number.

39639974242 is a deficient number, since it is larger than the sum of its proper divisors (25245944222).

39639974242 is a wasteful number, since it uses less digits than its factorization.

39639974242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569625.

The product of its digits is 17635968, while the sum is 58.

The spelling of 39639974242 in words is "thirty-nine billion, six hundred thirty-nine million, nine hundred seventy-four thousand, two hundred forty-two".