207024068965561 has 3 divisors (see below), whose sum is σ = 207024083353893. Its totient is φ = 207024054577230.

The previous prime is 207024068965559. The next prime is 207024068965621. The reversal of 207024068965561 is 165569860420702.

The square root of 207024068965561 is 14388331.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 207024068965561 - 2¹ = 207024068965559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 207024068965561.

It is not an unprimeable number, because it can be changed into a prime (207024063965561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7194166 + ... + 21582496.

It is an arithmetic number, because the mean of its divisors is an integer number (69008027784631).

Almost surely, 2^{207024068965561} is an apocalyptic number.

207024068965561 is the 14388331-st square number.

207024068965561 is the 7194166-th centered octagonal number.

It is an amenable number.

207024068965561 is a deficient number, since it is larger than the sum of its proper divisors (14388332).

207024068965561 is an frugal number, since it uses more digits than its factorization.

207024068965561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28776662 (or 14388331 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 207024068965561 in words is "two hundred seven trillion, twenty-four billion, sixty-eight million, nine hundred sixty-five thousand, five hundred sixty-one".