206166561524631 has 12 divisors (see below), whose sum is σ = 298417848281280. Its totient is φ = 137157434108160.

The previous prime is 206166561524579. The next prime is 206166561524669. The reversal of 206166561524631 is 136425165661602.

206166561524631 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 6 + 6 + 56 + 1 + 524 + 63 + 1 = 666.

206166561524631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206166561524631 - 2²⁶ = 206166494415767 is a prime.

It is a super-2 number, since 2×206166561524631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206166561529631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23911682250 + ... + 23911690871.

It is an arithmetic number, because the mean of its divisors is an integer number (24868154023440).

Almost surely, 2^{206166561524631} is an apocalyptic number.

206166561524631 is a deficient number, since it is larger than the sum of its proper divisors (92251286756649).

206166561524631 is a wasteful number, since it uses less digits than its factorization.

206166561524631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47823373606 (or 47823373603 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 206166561524631 in words is "two hundred six trillion, one hundred sixty-six billion, five hundred sixty-one million, five hundred twenty-four thousand, six hundred thirty-one".