253344635557 has 8 divisors (see below), whose sum is σ = 288881666136. Its totient is φ = 220100316672.

The previous prime is 253344635527. The next prime is 253344635561. The reversal of 253344635557 is 755536443352.

It can be written as a sum of positive squares in 4 ways, for example, as 52079347681 + 201265287876 = 228209^2 + 448626^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 253344635557 - 2⁷ = 253344635429 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 (253344635527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573177688 + ... + 573178129.

It is an arithmetic number, because the mean of its divisors is an integer number (36110208267).

Almost surely, 2^253344635557 is an apocalyptic number.

It is an amenable number.

253344635557 is a deficient number, since it is larger than the sum of its proper divisors (35537030579).

253344635557 is a wasteful number, since it uses less digits than its factorization.

253344635557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146355847.

The product of its digits is 22680000, while the sum is 52.

The spelling of 253344635557 in words is "two hundred fifty-three billion, three hundred forty-four million, six hundred thirty-five thousand, five hundred fifty-seven".