39120869743891 has 8 divisors (see below), whose sum is σ = 42315762870864. Its totient is φ = 35952490253280.

The previous prime is 39120869743871. The next prime is 39120869743997. The reversal of 39120869743891 is 19834796802193.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39120869743891 - 2¹⁷ = 39120869612819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39120869743891.

It is not an unprimeable number, because it can be changed into a prime (39120869743871) 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, 6628406020 + ... + 6628411921.

It is an arithmetic number, because the mean of its divisors is an integer number (5289470358858).

Almost surely, 2^{39120869743891} is an apocalyptic number.

39120869743891 is a deficient number, since it is larger than the sum of its proper divisors (3194893126973).

39120869743891 is a wasteful number, since it uses less digits than its factorization.

39120869743891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13256818181.

The product of its (nonzero) digits is 141087744, while the sum is 70.

The spelling of 39120869743891 in words is "thirty-nine trillion, one hundred twenty billion, eight hundred sixty-nine million, seven hundred forty-three thousand, eight hundred ninety-one".