206756253645 has 8 divisors (see below), whose sum is σ = 330810005856. Its totient is φ = 110270001936.

The previous prime is 206756253601. The next prime is 206756253647. The reversal of 206756253645 is 546352657602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206756253645 - 2⁹ = 206756253133 is a prime.

It is a super-3 number, since 3×206756253645³ (a number of 35 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206756253647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6891875107 + ... + 6891875136.

It is an arithmetic number, because the mean of its divisors is an integer number (41351250732).

Almost surely, 2^206756253645 is an apocalyptic number.

It is an amenable number.

206756253645 is a deficient number, since it is larger than the sum of its proper divisors (124053752211).

206756253645 is a wasteful number, since it uses less digits than its factorization.

206756253645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13783750251.

The product of its (nonzero) digits is 9072000, while the sum is 51.

The spelling of 206756253645 in words is "two hundred six billion, seven hundred fifty-six million, two hundred fifty-three thousand, six hundred forty-five".