250586872561 has 4 divisors (see below), whose sum is σ = 250591432000. Its totient is φ = 250582313124.

The previous prime is 250586872553. The next prime is 250586872577. The reversal of 250586872561 is 165278685052.

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 250586872561 - 2³ = 250586872553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250586872511) 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, 2196261 + ... + 2307538.

It is an arithmetic number, because the mean of its divisors is an integer number (62647858000).

Almost surely, 2^250586872561 is an apocalyptic number.

It is an amenable number.

250586872561 is a deficient number, since it is larger than the sum of its proper divisors (4559439).

250586872561 is an equidigital number, since it uses as much as digits as its factorization.

250586872561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559438.

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 250586872561 in words is "two hundred fifty billion, five hundred eighty-six million, eight hundred seventy-two thousand, five hundred sixty-one".