51134440009 has 2 divisors, whose sum is σ = 51134440010. Its totient is φ = 51134440008.

The previous prime is 51134439997. The next prime is 51134440039. The reversal of 51134440009 is 90004443115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33134192784 + 18000247225 = 182028^2 + 134165^2 .

It is a cyclic number.

It is not a de Polignac number, because 51134440009 - 2¹⁵ = 51134407241 is a prime.

It is a super-2 number, since 2×51134440009² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51134440039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25567220004 + 25567220005.

It is an arithmetic number, because the mean of its divisors is an integer number (25567220005).

Almost surely, 2^51134440009 is an apocalyptic number.

It is an amenable number.

51134440009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51134440009 is an equidigital number, since it uses as much as digits as its factorization.

51134440009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 51134440009 in words is "fifty-one billion, one hundred thirty-four million, four hundred forty thousand, nine".