50121631249 has 4 divisors (see below), whose sum is σ = 50123854564. Its totient is φ = 50119407936.

The previous prime is 50121631247. The next prime is 50121631279. The reversal of 50121631249 is 94213612105.

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 32840688400 + 17280942849 = 181220^2 + 131457^2 .

It is a cyclic number.

It is not a de Polignac number, because 50121631249 - 2¹ = 50121631247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50121631243) 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, 1077492 + ... + 1123045.

It is an arithmetic number, because the mean of its divisors is an integer number (12530963641).

Almost surely, 2^50121631249 is an apocalyptic number.

It is an amenable number.

50121631249 is a deficient number, since it is larger than the sum of its proper divisors (2223315).

50121631249 is a wasteful number, since it uses less digits than its factorization.

50121631249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223314.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 50121631249 in words is "fifty billion, one hundred twenty-one million, six hundred thirty-one thousand, two hundred forty-nine".