253665105211 has 4 divisors (see below), whose sum is σ = 289902977392. Its totient is φ = 217427233032.

The previous prime is 253665105193. The next prime is 253665105229. The reversal of 253665105211 is 112501566352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (253665105193) and next prime (253665105229).

It is a cyclic number.

It is not a de Polignac number, because 253665105211 - 2²³ = 253656716603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253665105251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18118936080 + ... + 18118936093.

It is an arithmetic number, because the mean of its divisors is an integer number (72475744348).

Almost surely, 2^253665105211 is an apocalyptic number.

253665105211 is a deficient number, since it is larger than the sum of its proper divisors (36237872181).

253665105211 is an equidigital number, since it uses as much as digits as its factorization.

253665105211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36237872180.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 253665105211 in words is "two hundred fifty-three billion, six hundred sixty-five million, one hundred five thousand, two hundred eleven".