209974416364036 has 81 divisors (see below), whose sum is σ = 391553512323519. Its totient is φ = 98505682668288.

The previous prime is 209974416363997. The next prime is 209974416364039. The reversal of 209974416364036 is 630463614479902.

The square root of 209974416364036 is 14490494.

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

It can be written as a sum of positive squares in 4 ways, for example, as 34033292445636 + 175941123918400 = 5833806^2 + 13264280^2 .

It is a super-4 number, since 4×209974416364036⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209974416364039) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 277377035770 + ... + 277377036526.

Almost surely, 2^{209974416364036} is an apocalyptic number.

209974416364036 is the 14490494-th square number.

It is an amenable number.

209974416364036 is a deficient number, since it is larger than the sum of its proper divisors (181579095959483).

209974416364036 is an frugal number, since it uses more digits than its factorization.

209974416364036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 64.

The spelling of 209974416364036 in words is "two hundred nine trillion, nine hundred seventy-four billion, four hundred sixteen million, three hundred sixty-four thousand, thirty-six".