252916565861 has 4 divisors (see below), whose sum is σ = 255280272192. Its totient is φ = 250552859532.

The previous prime is 252916565831. The next prime is 252916565873. The reversal of 252916565861 is 168565619252.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 252916565861 - 2³⁴ = 235736696677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252916565797 and 252916565806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252916565831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181853005 + ... + 1181853218.

It is an arithmetic number, because the mean of its divisors is an integer number (63820068048).

Almost surely, 2^252916565861 is an apocalyptic number.

It is an amenable number.

252916565861 is a deficient number, since it is larger than the sum of its proper divisors (2363706331).

252916565861 is a wasteful number, since it uses less digits than its factorization.

252916565861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363706330.

The product of its digits is 7776000, while the sum is 56.

The spelling of 252916565861 in words is "two hundred fifty-two billion, nine hundred sixteen million, five hundred sixty-five thousand, eight hundred sixty-one".