206556200200551 has 16 divisors (see below), whose sum is σ = 276187968746496. Its totient is φ = 137314680984096.

The previous prime is 206556200200547. The next prime is 206556200200579. The reversal of 206556200200551 is 155002002655602.

It is not a de Polignac number, because 206556200200551 - 2² = 206556200200547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206556200208551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47728155 + ... + 51875708.

It is an arithmetic number, because the mean of its divisors is an integer number (17261748046656).

Almost surely, 2^{206556200200551} is an apocalyptic number.

206556200200551 is a deficient number, since it is larger than the sum of its proper divisors (69631768545945).

206556200200551 is a wasteful number, since it uses less digits than its factorization.

206556200200551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99605822.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 206556200200551 in words is "two hundred six trillion, five hundred fifty-six billion, two hundred million, two hundred thousand, five hundred fifty-one".