561617310253 has 4 divisors (see below), whose sum is σ = 561626059680. Its totient is φ = 561608560828.

The previous prime is 561617310227. The next prime is 561617310259. The reversal of 561617310253 is 352013716165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352013716165 = 5 ⋅70402743233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561617310253 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 (561617310259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4277713 + ... + 4407046.

It is an arithmetic number, because the mean of its divisors is an integer number (140406514920).

Almost surely, 2^561617310253 is an apocalyptic number.

It is an amenable number.

561617310253 is a deficient number, since it is larger than the sum of its proper divisors (8749427).

561617310253 is an equidigital number, since it uses as much as digits as its factorization.

561617310253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749426.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 561617310253 in words is "five hundred sixty-one billion, six hundred seventeen million, three hundred ten thousand, two hundred fifty-three".