206212675472645 has 16 divisors (see below), whose sum is σ = 249906045193200. Its totient is φ = 163336260864000.

The previous prime is 206212675472611. The next prime is 206212675472647. The reversal of 206212675472645 is 546274576212602.

It can be written as a sum of positive squares in 8 ways, for example, as 1607372623684 + 204605302848961 = 1267822^2 + 14304031^2 .

It is not a de Polignac number, because 206212675472645 - 2²⁴ = 206212658695429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206212675472647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307422581 + ... + 308092629.

It is an arithmetic number, because the mean of its divisors is an integer number (15619127824575).

Almost surely, 2^{206212675472645} is an apocalyptic number.

It is an amenable number.

206212675472645 is a deficient number, since it is larger than the sum of its proper divisors (43693369720555).

206212675472645 is a wasteful number, since it uses less digits than its factorization.

206212675472645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279576.

The product of its (nonzero) digits is 67737600, while the sum is 59.

The spelling of 206212675472645 in words is "two hundred six trillion, two hundred twelve billion, six hundred seventy-five million, four hundred seventy-two thousand, six hundred forty-five".