253305721603 has 8 divisors (see below), whose sum is σ = 276560590320. Its totient is φ = 230088698880.

The previous prime is 253305721597. The next prime is 253305721621. The reversal of 253305721603 is 306127503352.

253305721603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253305721603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253305721663) 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 7 ways as a sum of consecutive naturals, for example, 9447498 + ... + 9474271.

It is an arithmetic number, because the mean of its divisors is an integer number (34570073790).

Almost surely, 2^253305721603 is an apocalyptic number.

253305721603 is a deficient number, since it is larger than the sum of its proper divisors (23254868717).

253305721603 is a wasteful number, since it uses less digits than its factorization.

253305721603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922997.

The product of its (nonzero) digits is 113400, while the sum is 37.

The spelling of 253305721603 in words is "two hundred fifty-three billion, three hundred five million, seven hundred twenty-one thousand, six hundred three".