51585258499 has 2 divisors, whose sum is σ = 51585258500. Its totient is φ = 51585258498.

The previous prime is 51585258481. The next prime is 51585258509. The reversal of 51585258499 is 99485258515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51585258499 - 2¹³ = 51585250307 is a prime.

It is a super-2 number, since 2×51585258499² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51585258479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25792629249 + 25792629250.

It is an arithmetic number, because the mean of its divisors is an integer number (25792629250).

Almost surely, 2^51585258499 is an apocalyptic number.

51585258499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51585258499 is an equidigital number, since it uses as much as digits as its factorization.

51585258499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920000, while the sum is 61.

The spelling of 51585258499 in words is "fifty-one billion, five hundred eighty-five million, two hundred fifty-eight thousand, four hundred ninety-nine".