206432501191 has 4 divisors (see below), whose sum is σ = 235922858512. Its totient is φ = 176942143872.

The previous prime is 206432501189. The next prime is 206432501201. The reversal of 206432501191 is 191105234602.

206432501191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206432501191 - 2¹ = 206432501189 is a prime.

It is a super-2 number, since 2×206432501191² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206432501111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14745178650 + ... + 14745178663.

It is an arithmetic number, because the mean of its divisors is an integer number (58980714628).

Almost surely, 2^206432501191 is an apocalyptic number.

206432501191 is a deficient number, since it is larger than the sum of its proper divisors (29490357321).

206432501191 is an equidigital number, since it uses as much as digits as its factorization.

206432501191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29490357320.

The product of its (nonzero) digits is 12960, while the sum is 34.

Adding to 206432501191 its reverse (191105234602), we get a palindrome (397537735793).

The spelling of 206432501191 in words is "two hundred six billion, four hundred thirty-two million, five hundred one thousand, one hundred ninety-one".