50448809561 has 4 divisors (see below), whose sum is σ = 53416386612. Its totient is φ = 47481232512.

The previous prime is 50448809549. The next prime is 50448809603. The reversal of 50448809561 is 16590884405.

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 28479937600 + 21968871961 = 168760^2 + 148219^2 .

It is a cyclic number.

It is not a de Polignac number, because 50448809561 - 2⁶ = 50448809497 is a prime.

It is a super-2 number, since 2×50448809561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50448800561) 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, 1483788500 + ... + 1483788533.

It is an arithmetic number, because the mean of its divisors is an integer number (13354096653).

Almost surely, 2^50448809561 is an apocalyptic number.

It is an amenable number.

50448809561 is a deficient number, since it is larger than the sum of its proper divisors (2967577051).

50448809561 is a wasteful number, since it uses less digits than its factorization.

50448809561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967577050.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 50448809561 in words is "fifty billion, four hundred forty-eight million, eight hundred nine thousand, five hundred sixty-one".