253016643205 has 4 divisors (see below), whose sum is σ = 303619971852. Its totient is φ = 202413314560.

The previous prime is 253016643193. The next prime is 253016643221. The reversal of 253016643205 is 502346610352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40664335716 + 212352307489 = 201654^2 + 460817^2 .

It is not a de Polignac number, because 253016643205 - 2²⁵ = 252983088773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25301664316 + ... + 25301664325.

It is an arithmetic number, because the mean of its divisors is an integer number (75904992963).

Almost surely, 2^253016643205 is an apocalyptic number.

It is an amenable number.

253016643205 is a deficient number, since it is larger than the sum of its proper divisors (50603328647).

253016643205 is an equidigital number, since it uses as much as digits as its factorization.

253016643205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50603328646.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 253016643205 in words is "two hundred fifty-three billion, sixteen million, six hundred forty-three thousand, two hundred five".