253965989503 has 4 divisors (see below), whose sum is σ = 253968946200. Its totient is φ = 253963032808.

The previous prime is 253965989491. The next prime is 253965989509. The reversal of 253965989503 is 305989569352.

It is a happy number.

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-253965989503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253965989509) 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, 1345528 + ... + 1522621.

It is an arithmetic number, because the mean of its divisors is an integer number (63492236550).

Almost surely, 2^253965989503 is an apocalyptic number.

253965989503 is a deficient number, since it is larger than the sum of its proper divisors (2956697).

253965989503 is an equidigital number, since it uses as much as digits as its factorization.

253965989503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956696.

The product of its (nonzero) digits is 78732000, while the sum is 64.

The spelling of 253965989503 in words is "two hundred fifty-three billion, nine hundred sixty-five million, nine hundred eighty-nine thousand, five hundred three".