206767002157 has 4 divisors (see below), whose sum is σ = 215756871840. Its totient is φ = 197777132476.

The previous prime is 206767002131. The next prime is 206767002187. The reversal of 206767002157 is 751200767602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206767002157 - 2²⁷ = 206632784429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206767002107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4494934807 + ... + 4494934852.

It is an arithmetic number, because the mean of its divisors is an integer number (53939217960).

Almost surely, 2^206767002157 is an apocalyptic number.

It is an amenable number.

206767002157 is a deficient number, since it is larger than the sum of its proper divisors (8989869683).

206767002157 is an equidigital number, since it uses as much as digits as its factorization.

206767002157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8989869682.

The product of its (nonzero) digits is 246960, while the sum is 43.

Adding to 206767002157 its reverse (751200767602), we get a palindrome (957967769759).

The spelling of 206767002157 in words is "two hundred six billion, seven hundred sixty-seven million, two thousand, one hundred fifty-seven".