50561511001 has 4 divisors (see below), whose sum is σ = 50606777572. Its totient is φ = 50516244432.

The previous prime is 50561510981. The next prime is 50561511031. The reversal of 50561511001 is 10011516505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8515598400 + 42045912601 = 92280^2 + 205051^2 .

It is a cyclic number.

It is not a de Polignac number, because 50561511001 - 2⁷ = 50561510873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50561511031) 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, 22631610 + ... + 22633843.

It is an arithmetic number, because the mean of its divisors is an integer number (12651694393).

Almost surely, 2^50561511001 is an apocalyptic number.

It is an amenable number.

50561511001 is a deficient number, since it is larger than the sum of its proper divisors (45266571).

50561511001 is a wasteful number, since it uses less digits than its factorization.

50561511001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45266570.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 50561511001 in words is "fifty billion, five hundred sixty-one million, five hundred eleven thousand, one".