201543345555 has 32 divisors (see below), whose sum is σ = 349765915968. Its totient is φ = 98699366400.

The previous prime is 201543345517. The next prime is 201543345559. The reversal of 201543345555 is 555543345102.

It is not a de Polignac number, because 201543345555 - 2¹³ = 201543337363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201543345559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9628156 + ... + 9649065.

It is an arithmetic number, because the mean of its divisors is an integer number (10930184874).

Almost surely, 2^201543345555 is an apocalyptic number.

201543345555 is a deficient number, since it is larger than the sum of its proper divisors (148222570413).

201543345555 is a wasteful number, since it uses less digits than its factorization.

201543345555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19277287.

The product of its (nonzero) digits is 900000, while the sum is 42.

The spelling of 201543345555 in words is "two hundred one billion, five hundred forty-three million, three hundred forty-five thousand, five hundred fifty-five".