252560617667661 has 4 divisors (see below), whose sum is σ = 336747490223552. Its totient is φ = 168373745111772.

The previous prime is 252560617667641. The next prime is 252560617667669. The reversal of 252560617667661 is 166766716065252.

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 not a de Polignac number, because 252560617667661 - 2¹¹ = 252560617665613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252560617667592 and 252560617667601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252560617667669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42093436277941 + ... + 42093436277946.

It is an arithmetic number, because the mean of its divisors is an integer number (84186872555888).

Almost surely, 2^{252560617667661} is an apocalyptic number.

It is an amenable number.

252560617667661 is a deficient number, since it is larger than the sum of its proper divisors (84186872555891).

252560617667661 is an equidigital number, since it uses as much as digits as its factorization.

252560617667661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84186872555890.

The product of its (nonzero) digits is 228614400, while the sum is 66.

The spelling of 252560617667661 in words is "two hundred fifty-two trillion, five hundred sixty billion, six hundred seventeen million, six hundred sixty-seven thousand, six hundred sixty-one".