209931005088016 has 45 divisors (see below), whose sum is σ = 407169934119319. Its totient is φ = 104855009460512.

The previous prime is 209931005087983. The next prime is 209931005088019. The reversal of 209931005088016 is 610880500139902.

The square root of 209931005088016 is 14488996.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209931005088019) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 103567342395 + ... + 103567344421.

Almost surely, 2^{209931005088016} is an apocalyptic number.

209931005088016 is the 14488996-th square number.

It is an amenable number.

209931005088016 is a deficient number, since it is larger than the sum of its proper divisors (197238929031303).

209931005088016 is an frugal number, since it uses more digits than its factorization.

209931005088016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 209931005088016 in words is "two hundred nine trillion, nine hundred thirty-one billion, five million, eighty-eight thousand, sixteen".