39845838121 has 8 divisors (see below), whose sum is σ = 40580240000. Its totient is φ = 39114055440.

The previous prime is 39845838101. The next prime is 39845838169. The reversal of 39845838121 is 12183854893.

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 39845838121 - 2⁹ = 39845837609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39845838101) 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, 624081 + ... + 684958.

It is an arithmetic number, because the mean of its divisors is an integer number (5072530000).

Almost surely, 2^39845838121 is an apocalyptic number.

It is an amenable number.

39845838121 is a deficient number, since it is larger than the sum of its proper divisors (734401879).

39845838121 is a wasteful number, since it uses less digits than its factorization.

39845838121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309599.

The product of its digits is 1658880, while the sum is 52.

The spelling of 39845838121 in words is "thirty-nine billion, eight hundred forty-five million, eight hundred thirty-eight thousand, one hundred twenty-one".