50811608521 has 2 divisors, whose sum is σ = 50811608522. Its totient is φ = 50811608520.

The previous prime is 50811608503. The next prime is 50811608633. The reversal of 50811608521 is 12580611805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47104625296 + 3706983225 = 217036^2 + 60885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50811608521 is a prime.

It is not a weakly prime, because it can be changed into another prime (50811608821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25405804260 + 25405804261.

It is an arithmetic number, because the mean of its divisors is an integer number (25405804261).

Almost surely, 2^50811608521 is an apocalyptic number.

It is an amenable number.

50811608521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50811608521 is an equidigital number, since it uses as much as digits as its factorization.

50811608521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 37.

The spelling of 50811608521 in words is "fifty billion, eight hundred eleven million, six hundred eight thousand, five hundred twenty-one".