50565076806521 has 2 divisors, whose sum is σ = 50565076806522. Its totient is φ = 50565076806520.

The previous prime is 50565076806487. The next prime is 50565076806589. The reversal of 50565076806521 is 12560867056505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28983579649600 + 21581497156921 = 5383640^2 + 4645589^2 .

It is a cyclic number.

It is not a de Polignac number, because 50565076806521 - 2²² = 50565072612217 is a prime.

It is not a weakly prime, because it can be changed into another prime (50565076805521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25282538403260 + 25282538403261.

It is an arithmetic number, because the mean of its divisors is an integer number (25282538403261).

Almost surely, 2^{50565076806521} is an apocalyptic number.

It is an amenable number.

50565076806521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50565076806521 is an equidigital number, since it uses as much as digits as its factorization.

50565076806521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120000, while the sum is 56.

The spelling of 50565076806521 in words is "fifty trillion, five hundred sixty-five billion, seventy-six million, eight hundred six thousand, five hundred twenty-one".