16845171031 has 16 divisors (see below), whose sum is σ = 19217413600. Its totient is φ = 14637138048.

The previous prime is 16845171023. The next prime is 16845171067. The reversal of 16845171031 is 13017154861.

It is a happy number.

It is not a de Polignac number, because 16845171031 - 2³ = 16845171023 is a prime.

It is a super-2 number, since 2×16845171031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16845172031) 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 15 ways as a sum of consecutive naturals, for example, 178416 + ... + 255973.

It is an arithmetic number, because the mean of its divisors is an integer number (1201088350).

Almost surely, 2^16845171031 is an apocalyptic number.

16845171031 is a deficient number, since it is larger than the sum of its proper divisors (2372242569).

16845171031 is a wasteful number, since it uses less digits than its factorization.

16845171031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434578.

The product of its (nonzero) digits is 20160, while the sum is 37.

It can be divided in two parts, 1684 and 5171031, that added together give a palindrome (5172715).

The spelling of 16845171031 in words is "sixteen billion, eight hundred forty-five million, one hundred seventy-one thousand, thirty-one".