253273140661 has 2 divisors, whose sum is σ = 253273140662. Its totient is φ = 253273140660.

The previous prime is 253273140647. The next prime is 253273140683. The reversal of 253273140661 is 166041372352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237942986436 + 15330154225 = 487794^2 + 123815^2 .

It is a cyclic number.

It is not a de Polignac number, because 253273140661 - 2²³ = 253264752053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253273140061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126636570330 + 126636570331.

It is an arithmetic number, because the mean of its divisors is an integer number (126636570331).

Almost surely, 2^253273140661 is an apocalyptic number.

It is an amenable number.

253273140661 is a deficient number, since it is larger than the sum of its proper divisors (1).

253273140661 is an equidigital number, since it uses as much as digits as its factorization.

253273140661 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 40.

The spelling of 253273140661 in words is "two hundred fifty-three billion, two hundred seventy-three million, one hundred forty thousand, six hundred sixty-one".