201011011655 has 16 divisors (see below), whose sum is σ = 251120308320. Its totient is φ = 154274719872.

The previous prime is 201011011603. The next prime is 201011011657. The reversal of 201011011655 is 556110110102.

It is a cyclic number.

It is not a de Polignac number, because 201011011655 - 2²² = 201006817351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201011011655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011011657) 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 15 ways as a sum of consecutive naturals, for example, 4392149 + ... + 4437678.

It is an arithmetic number, because the mean of its divisors is an integer number (15695019270).

Almost surely, 2^201011011655 is an apocalyptic number.

201011011655 is a deficient number, since it is larger than the sum of its proper divisors (50109296665).

201011011655 is a wasteful number, since it uses less digits than its factorization.

201011011655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830018.

The product of its (nonzero) digits is 300, while the sum is 23.

Adding to 201011011655 its reverse (556110110102), we get a palindrome (757121121757).

The spelling of 201011011655 in words is "two hundred one billion, eleven million, eleven thousand, six hundred fifty-five".