39981940089 has 64 divisors (see below), whose sum is σ = 67032000000. Its totient is φ = 21063684096.

The previous prime is 39981940079. The next prime is 39981940121. The reversal of 39981940089 is 98004918993.

It is a happy number.

It is not a de Polignac number, because 39981940089 - 2⁴ = 39981940073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39981940079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16706677 + ... + 16709069.

It is an arithmetic number, because the mean of its divisors is an integer number (1047375000).

Almost surely, 2^39981940089 is an apocalyptic number.

39981940089 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

39981940089 is a deficient number, since it is larger than the sum of its proper divisors (27050059911).

39981940089 is a wasteful number, since it uses less digits than its factorization.

39981940089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679 (or 3665 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 60.

The spelling of 39981940089 in words is "thirty-nine billion, nine hundred eighty-one million, nine hundred forty thousand, eighty-nine".