561165552313 has 4 divisors (see below), whose sum is σ = 576332188900. Its totient is φ = 545998915728.

The previous prime is 561165552301. The next prime is 561165552319. The reversal of 561165552313 is 313255561165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313255561165 = 5 ⋅62651112233.

It can be written as a sum of positive squares in 2 ways, for example, as 523926973584 + 37238578729 = 723828^2 + 192973^2 .

It is a cyclic number.

It is not a de Polignac number, because 561165552313 - 2⁵ = 561165552281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561165552313.

It is not an unprimeable number, because it can be changed into a prime (561165552319) 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, 7583318238 + ... + 7583318311.

It is an arithmetic number, because the mean of its divisors is an integer number (144083047225).

Almost surely, 2^561165552313 is an apocalyptic number.

It is an amenable number.

561165552313 is a deficient number, since it is larger than the sum of its proper divisors (15166636587).

561165552313 is a wasteful number, since it uses less digits than its factorization.

561165552313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166636586.

The product of its digits is 405000, while the sum is 43.

The spelling of 561165552313 in words is "five hundred sixty-one billion, one hundred sixty-five million, five hundred fifty-two thousand, three hundred thirteen".