51050160661 has 4 divisors (see below), whose sum is σ = 51072661900. Its totient is φ = 51027659424.

The previous prime is 51050160653. The next prime is 51050160703. The reversal of 51050160661 is 16606105015.

51050160661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7241159025 + 43809001636 = 85095^2 + 209306^2 .

It is a cyclic number.

It is not a de Polignac number, because 51050160661 - 2³ = 51050160653 is a prime.

It is a super-2 number, since 2×51050160661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51050160641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11247216 + ... + 11251753.

It is an arithmetic number, because the mean of its divisors is an integer number (12768165475).

Almost surely, 2^51050160661 is an apocalyptic number.

It is an amenable number.

51050160661 is a deficient number, since it is larger than the sum of its proper divisors (22501239).

51050160661 is a wasteful number, since it uses less digits than its factorization.

51050160661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22501238.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 51050160661 its reverse (16606105015), we get a palindrome (67656265676).

The spelling of 51050160661 in words is "fifty-one billion, fifty million, one hundred sixty thousand, six hundred sixty-one".