201142566461 has 2 divisors, whose sum is σ = 201142566462. Its totient is φ = 201142566460.

The previous prime is 201142566451. The next prime is 201142566467. The reversal of 201142566461 is 164665241102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164702047225 + 36440519236 = 405835^2 + 190894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201142566461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201142566467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100571283230 + 100571283231.

It is an arithmetic number, because the mean of its divisors is an integer number (100571283231).

Almost surely, 2^201142566461 is an apocalyptic number.

It is an amenable number.

201142566461 is a deficient number, since it is larger than the sum of its proper divisors (1).

201142566461 is an equidigital number, since it uses as much as digits as its factorization.

201142566461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 201142566461 in words is "two hundred one billion, one hundred forty-two million, five hundred sixty-six thousand, four hundred sixty-one".