50651610661 has 2 divisors, whose sum is σ = 50651610662. Its totient is φ = 50651610660.

The previous prime is 50651610649. The next prime is 50651610677. The reversal of 50651610661 is 16601615605.

50651610661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34222780036 + 16428830625 = 184994^2 + 128175^2 .

It is a cyclic number.

It is not a de Polignac number, because 50651610661 - 2⁵ = 50651610629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50651610661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50651616661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25325805330 + 25325805331.

It is an arithmetic number, because the mean of its divisors is an integer number (25325805331).

Almost surely, 2^50651610661 is an apocalyptic number.

It is an amenable number.

50651610661 is a deficient number, since it is larger than the sum of its proper divisors (1).

50651610661 is an equidigital number, since it uses as much as digits as its factorization.

50651610661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 50651610661 in words is "fifty billion, six hundred fifty-one million, six hundred ten thousand, six hundred sixty-one".