39936742737 has 32 divisors (see below), whose sum is σ = 60200921088. Its totient is φ = 23411410176.

The previous prime is 39936742733. The next prime is 39936742739. The reversal of 39936742737 is 73724763993.

It is a happy number.

It is not a de Polignac number, because 39936742737 - 2² = 39936742733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39936742733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345453 + ... + 446330.

It is an arithmetic number, because the mean of its divisors is an integer number (1881278784).

Almost surely, 2^39936742737 is an apocalyptic number.

It is an amenable number.

39936742737 is a deficient number, since it is larger than the sum of its proper divisors (20264178351).

39936742737 is a wasteful number, since it uses less digits than its factorization.

39936742737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791869.

The product of its digits is 36006768, while the sum is 60.

The spelling of 39936742737 in words is "thirty-nine billion, nine hundred thirty-six million, seven hundred forty-two thousand, seven hundred thirty-seven".