16171667920 has 20 divisors (see below), whose sum is σ = 37599128100. Its totient is φ = 6468667136.

The previous prime is 16171667891. The next prime is 16171667947. The reversal of 16171667920 is 2976617161.

It can be written as a sum of positive squares in 2 ways, for example, as 3722464144 + 12449203776 = 61012^2 + 111576^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101072845 + ... + 101073004.

It is an arithmetic number, because the mean of its divisors is an integer number (1879956405).

Almost surely, 2^16171667920 is an apocalyptic number.

16171667920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16171667920 is an abundant number, since it is smaller than the sum of its proper divisors (21427460180).

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

16171667920 is a wasteful number, since it uses less digits than its factorization.

16171667920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202145862 (or 202145856 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 16171667920 in words is "sixteen billion, one hundred seventy-one million, six hundred sixty-seven thousand, nine hundred twenty".