206475326648651 has 4 divisors (see below), whose sum is σ = 213135821056704. Its totient is φ = 199814832240600.

The previous prime is 206475326648627. The next prime is 206475326648653. The reversal of 206475326648651 is 156846623574602.

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 206475326648651 - 2⁴² = 202077280137547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206475326648653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330247203980 + ... + 3330247204041.

It is an arithmetic number, because the mean of its divisors is an integer number (53283955264176).

Almost surely, 2^{206475326648651} is an apocalyptic number.

206475326648651 is a deficient number, since it is larger than the sum of its proper divisors (6660494408053).

206475326648651 is an equidigital number, since it uses as much as digits as its factorization.

206475326648651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660494408052.

The product of its (nonzero) digits is 348364800, while the sum is 65.

The spelling of 206475326648651 in words is "two hundred six trillion, four hundred seventy-five billion, three hundred twenty-six million, six hundred forty-eight thousand, six hundred fifty-one".