206235966890149 has 16 divisors (see below), whose sum is σ = 236028362752000. Its totient is φ = 176526111929904.

The previous prime is 206235966890131. The next prime is 206235966890171. The reversal of 206235966890149 is 941098669532602.

It is a cyclic number.

It is not a de Polignac number, because 206235966890149 - 2⁵ = 206235966890117 is a prime.

It is a super-2 number, since 2×206235966890149² (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 (206235966890189) 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 15 ways as a sum of consecutive naturals, for example, 211516252 + ... + 212489050.

It is an arithmetic number, because the mean of its divisors is an integer number (14751772672000).

Almost surely, 2^{206235966890149} is an apocalyptic number.

It is an amenable number.

206235966890149 is a deficient number, since it is larger than the sum of its proper divisors (29792395861851).

206235966890149 is an equidigital number, since it uses as much as digits as its factorization.

206235966890149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015192.

The product of its (nonzero) digits is 302330880, while the sum is 70.

The spelling of 206235966890149 in words is "two hundred six trillion, two hundred thirty-five billion, nine hundred sixty-six million, eight hundred ninety thousand, one hundred forty-nine".