206436066451 has 16 divisors (see below), whose sum is σ = 227337384960. Its totient is φ = 186741357120.

The previous prime is 206436066443. The next prime is 206436066469. The reversal of 206436066451 is 154660634602.

It is not a de Polignac number, because 206436066451 - 2³ = 206436066443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206436066398 and 206436066407.

It is not an unprimeable number, because it can be changed into a prime (206436060451) 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 15 ways as a sum of consecutive naturals, for example, 2782551 + ... + 2855776.

It is an arithmetic number, because the mean of its divisors is an integer number (14208586560).

Almost surely, 2^206436066451 is an apocalyptic number.

206436066451 is a deficient number, since it is larger than the sum of its proper divisors (20901318509).

206436066451 is a wasteful number, since it uses less digits than its factorization.

206436066451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638434.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 206436066451 in words is "two hundred six billion, four hundred thirty-six million, sixty-six thousand, four hundred fifty-one".