201061055561 has 8 divisors (see below), whose sum is σ = 211649173920. Its totient is φ = 190473532992.

The previous prime is 201061055557. The next prime is 201061055579. The reversal of 201061055561 is 165550160102.

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

It is a cyclic number.

It is not a de Polignac number, because 201061055561 - 2² = 201061055557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201061055551) 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, 655106 + ... + 911748.

It is an arithmetic number, because the mean of its divisors is an integer number (26456146740).

Almost surely, 2^201061055561 is an apocalyptic number.

It is an amenable number.

201061055561 is a deficient number, since it is larger than the sum of its proper divisors (10588118359).

201061055561 is a wasteful number, since it uses less digits than its factorization.

201061055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297895.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 201061055561 in words is "two hundred one billion, sixty-one million, fifty-five thousand, five hundred sixty-one".