50561542421 has 8 divisors (see below), whose sum is σ = 54452741784. Its totient is φ = 46670607360.

The previous prime is 50561542397. The next prime is 50561542457. The reversal of 50561542421 is 12424516505.

It can be written as a sum of positive squares in 4 ways, for example, as 15076401796 + 35485140625 = 122786^2 + 188375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50561542421 - 2⁶ = 50561542357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50561542121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531401 + ... + 619281.

It is an arithmetic number, because the mean of its divisors is an integer number (6806592723).

Almost surely, 2^50561542421 is an apocalyptic number.

It is an amenable number.

50561542421 is a deficient number, since it is larger than the sum of its proper divisors (3891199363).

50561542421 is a wasteful number, since it uses less digits than its factorization.

50561542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132151.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 50561542421 in words is "fifty billion, five hundred sixty-one million, five hundred forty-two thousand, four hundred twenty-one".