50641000061 has 2 divisors, whose sum is σ = 50641000062. Its totient is φ = 50641000060.

The previous prime is 50641000019. The next prime is 50641000121. The reversal of 50641000061 is 16000014605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49731676036 + 909324025 = 223006^2 + 30155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50641000061 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50641000261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25320500030 + 25320500031.

It is an arithmetic number, because the mean of its divisors is an integer number (25320500031).

Almost surely, 2^50641000061 is an apocalyptic number.

It is an amenable number.

50641000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

50641000061 is an equidigital number, since it uses as much as digits as its factorization.

50641000061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 50641000061 its reverse (16000014605), we get a palindrome (66641014666).

The spelling of 50641000061 in words is "fifty billion, six hundred forty-one million, sixty-one", and thus it is an aban number.