50905898509 has 2 divisors, whose sum is σ = 50905898510. Its totient is φ = 50905898508.

The previous prime is 50905898423. The next prime is 50905898531. The reversal of 50905898509 is 90589850905.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49004676900 + 1901221609 = 221370^2 + 43603^2 .

It is a cyclic number.

It is not a de Polignac number, because 50905898509 - 2¹⁵ = 50905865741 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50905898579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25452949254 + 25452949255.

It is an arithmetic number, because the mean of its divisors is an integer number (25452949255).

Almost surely, 2^50905898509 is an apocalyptic number.

It is an amenable number.

50905898509 is a deficient number, since it is larger than the sum of its proper divisors (1).

50905898509 is an equidigital number, since it uses as much as digits as its factorization.

50905898509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 58.

The spelling of 50905898509 in words is "fifty billion, nine hundred five million, eight hundred ninety-eight thousand, five hundred nine".