253663641211 has 4 divisors (see below), whose sum is σ = 257236368624. Its totient is φ = 250090913800.

The previous prime is 253663641197. The next prime is 253663641223. The reversal of 253663641211 is 112146366352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253663641211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253663651211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786363600 + ... + 1786363741.

It is an arithmetic number, because the mean of its divisors is an integer number (64309092156).

Almost surely, 2^253663641211 is an apocalyptic number.

253663641211 is a deficient number, since it is larger than the sum of its proper divisors (3572727413).

253663641211 is an equidigital number, since it uses as much as digits as its factorization.

253663641211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572727412.

The product of its digits is 155520, while the sum is 40.

The spelling of 253663641211 in words is "two hundred fifty-three billion, six hundred sixty-three million, six hundred forty-one thousand, two hundred eleven".