51450415249 has 2 divisors, whose sum is σ = 51450415250. Its totient is φ = 51450415248.

The previous prime is 51450415223. The next prime is 51450415259. The reversal of 51450415249 is 94251405415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51441415249 + 9000000 = 226807^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 51450415249 - 2²³ = 51442026641 is a prime.

It is not a weakly prime, because it can be changed into another prime (51450415259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725207624 + 25725207625.

It is an arithmetic number, because the mean of its divisors is an integer number (25725207625).

Almost surely, 2^51450415249 is an apocalyptic number.

It is an amenable number.

51450415249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51450415249 is an equidigital number, since it uses as much as digits as its factorization.

51450415249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 51450415249 in words is "fifty-one billion, four hundred fifty million, four hundred fifteen thousand, two hundred forty-nine".