39987565099 has 4 divisors (see below), whose sum is σ = 40067701000. Its totient is φ = 39907429200.

The previous prime is 39987565097. The next prime is 39987565117. The reversal of 39987565099 is 99056578993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39987565099 - 2¹ = 39987565097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39987565097) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40067202 + ... + 40068199.

It is an arithmetic number, because the mean of its divisors is an integer number (10016925250).

Almost surely, 2^39987565099 is an apocalyptic number.

39987565099 is a deficient number, since it is larger than the sum of its proper divisors (80135901).

39987565099 is an equidigital number, since it uses as much as digits as its factorization.

39987565099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80135900.

The product of its (nonzero) digits is 165337200, while the sum is 70.

The spelling of 39987565099 in words is "thirty-nine billion, nine hundred eighty-seven million, five hundred sixty-five thousand, ninety-nine".