201053764661 has 2 divisors, whose sum is σ = 201053764662. Its totient is φ = 201053764660.

The previous prime is 201053764651. The next prime is 201053764687. The reversal of 201053764661 is 166467350102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111843424900 + 89210339761 = 334430^2 + 298681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201053764661 is a prime.

It is a super-3 number, since 3×201053764661³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201053764651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100526882330 + 100526882331.

It is an arithmetic number, because the mean of its divisors is an integer number (100526882331).

Almost surely, 2^201053764661 is an apocalyptic number.

It is an amenable number.

201053764661 is a deficient number, since it is larger than the sum of its proper divisors (1).

201053764661 is an equidigital number, since it uses as much as digits as its factorization.

201053764661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 201053764661 in words is "two hundred one billion, fifty-three million, seven hundred sixty-four thousand, six hundred sixty-one".