49315251409 has 2 divisors, whose sum is σ = 49315251410. Its totient is φ = 49315251408.

The previous prime is 49315251383. The next prime is 49315251439. The reversal of 49315251409 is 90415251394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47828377809 + 1486873600 = 218697^2 + 38560^2 .

It is a cyclic number.

It is not a de Polignac number, because 49315251409 - 2³¹ = 47167767761 is a prime.

It is not a weakly prime, because it can be changed into another prime (49315251439) 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, 24657625704 + 24657625705.

It is an arithmetic number, because the mean of its divisors is an integer number (24657625705).

Almost surely, 2^49315251409 is an apocalyptic number.

It is an amenable number.

49315251409 is a deficient number, since it is larger than the sum of its proper divisors (1).

49315251409 is an equidigital number, since it uses as much as digits as its factorization.

49315251409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 49315251409 in words is "forty-nine billion, three hundred fifteen million, two hundred fifty-one thousand, four hundred nine".