1253501443163 has 4 divisors (see below), whose sum is σ = 1253509867368. Its totient is φ = 1253493018960.

The previous prime is 1253501443147. The next prime is 1253501443177. The reversal of 1253501443163 is 3613441053521.

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

It is a cyclic number.

It is not a de Polignac number, because 1253501443163 - 2⁴ = 1253501443147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253501443123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984818 + ... + 4287863.

It is an arithmetic number, because the mean of its divisors is an integer number (313377466842).

Almost surely, 2^{1253501443163} is an apocalyptic number.

1253501443163 is a deficient number, since it is larger than the sum of its proper divisors (8424205).

1253501443163 is an equidigital number, since it uses as much as digits as its factorization.

1253501443163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424204.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 1253501443163 its reverse (3613441053521), we get a palindrome (4866942496684).

The spelling of 1253501443163 in words is "one trillion, two hundred fifty-three billion, five hundred one million, four hundred forty-three thousand, one hundred sixty-three".