51005009641 has 2 divisors, whose sum is σ = 51005009642. Its totient is φ = 51005009640.

The previous prime is 51005009597. The next prime is 51005009647. The reversal of 51005009641 is 14690050015.

51005009641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49869589225 + 1135420416 = 223315^2 + 33696^2 .

It is a cyclic number.

It is not a de Polignac number, because 51005009641 - 2¹³ = 51005001449 is a prime.

It is a super-2 number, since 2×51005009641² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51005009647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502504820 + 25502504821.

It is an arithmetic number, because the mean of its divisors is an integer number (25502504821).

Almost surely, 2^51005009641 is an apocalyptic number.

It is an amenable number.

51005009641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51005009641 is an equidigital number, since it uses as much as digits as its factorization.

51005009641 is an evil number, because the sum of its binary digits is even.

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

Adding to 51005009641 its reverse (14690050015), we get a palindrome (65695059656).

The spelling of 51005009641 in words is "fifty-one billion, five million, nine thousand, six hundred forty-one".