15854850442172 has 24 divisors (see below), whose sum is σ = 32091745478016. Its totient is φ = 6713069205168.

The previous prime is 15854850442169. The next prime is 15854850442177. The reversal of 15854850442172 is 27124405845851.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15854850442177) 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, 3411110078 + ... + 3411114725.

It is an arithmetic number, because the mean of its divisors is an integer number (1337156061584).

Almost surely, 2^{15854850442172} is an apocalyptic number.

It is an amenable number.

15854850442172 is an abundant number, since it is smaller than the sum of its proper divisors (16236895035844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15854850442172 is a wasteful number, since it uses less digits than its factorization.

15854850442172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822224897 (or 6822224895 counting only the distinct ones).

The product of its (nonzero) digits is 14336000, while the sum is 56.

The spelling of 15854850442172 in words is "fifteen trillion, eight hundred fifty-four billion, eight hundred fifty million, four hundred forty-two thousand, one hundred seventy-two".