207064131849 has 9 divisors (see below), whose sum is σ = 299094606759. Its totient is φ = 138041844480.

The previous prime is 207064131803. The next prime is 207064131851. The reversal of 207064131849 is 948131460702.

The square root of 207064131849 is 455043.

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

It can be written as a sum of positive squares in only one way, i.e., 184636074249 + 22428057600 = 429693^2 + 149760^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 207064131849 - 2⁷ = 207064131721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207064131049) 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, 1289289 + ... + 1440969.

Almost surely, 2^207064131849 is an apocalyptic number.

207064131849 is the 455043-rd square number.

207064131849 is the 227522-nd centered octagonal number.

It is an amenable number.

207064131849 is a deficient number, since it is larger than the sum of its proper divisors (92030474910).

207064131849 is an frugal number, since it uses more digits than its factorization.

207064131849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303368 (or 151684 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 207064131849 in words is "two hundred seven billion, sixty-four million, one hundred thirty-one thousand, eight hundred forty-nine".