50120006015561 has 2 divisors, whose sum is σ = 50120006015562. Its totient is φ = 50120006015560.

The previous prime is 50120006015543. The next prime is 50120006015591. The reversal of 50120006015561 is 16551060002105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48600348246025 + 1519657769536 = 6971395^2 + 1232744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50120006015561 is a prime.

It is not a weakly prime, because it can be changed into another prime (50120006015591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25060003007780 + 25060003007781.

It is an arithmetic number, because the mean of its divisors is an integer number (25060003007781).

Almost surely, 2^{50120006015561} is an apocalyptic number.

It is an amenable number.

50120006015561 is a deficient number, since it is larger than the sum of its proper divisors (1).

50120006015561 is an equidigital number, since it uses as much as digits as its factorization.

50120006015561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 50120006015561 its reverse (16551060002105), we get a palindrome (66671066017666).

The spelling of 50120006015561 in words is "fifty trillion, one hundred twenty billion, six million, fifteen thousand, five hundred sixty-one".