51585258539 has 2 divisors, whose sum is σ = 51585258540. Its totient is φ = 51585258538.

The previous prime is 51585258509. The next prime is 51585258553. The reversal of 51585258539 is 93585258515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51585258539 - 2¹² = 51585254443 is a prime.

It is a super-2 number, since 2×51585258539² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51585258509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25792629269 + 25792629270.

It is an arithmetic number, because the mean of its divisors is an integer number (25792629270).

Almost surely, 2^51585258539 is an apocalyptic number.

51585258539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51585258539 is an equidigital number, since it uses as much as digits as its factorization.

51585258539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800000, while the sum is 56.

The spelling of 51585258539 in words is "fifty-one billion, five hundred eighty-five million, two hundred fifty-eight thousand, five hundred thirty-nine".