16531720958208 has 72 divisors (see below), whose sum is σ = 44000446256928. Its totient is φ = 5510328205312.

The previous prime is 16531720958191. The next prime is 16531720958237. The reversal of 16531720958208 is 80285902713561.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17198416 + ... + 18134192.

It is an arithmetic number, because the mean of its divisors is an integer number (611117309124).

Almost surely, 2^{16531720958208} is an apocalyptic number.

It is an amenable number.

16531720958208 is an abundant number, since it is smaller than the sum of its proper divisors (27468725298720).

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

16531720958208 is an equidigital number, since it uses as much as digits as its factorization.

16531720958208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958799 (or 958785 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 16531720958208 in words is "sixteen trillion, five hundred thirty-one billion, seven hundred twenty million, nine hundred fifty-eight thousand, two hundred eight".