1540258138439 has 2 divisors, whose sum is σ = 1540258138440. Its totient is φ = 1540258138438.

The previous prime is 1540258138423. The next prime is 1540258138451. The reversal of 1540258138439 is 9348318520451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540258138439 - 2⁴ = 1540258138423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540258038439) 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, 770129069219 + 770129069220.

It is an arithmetic number, because the mean of its divisors is an integer number (770129069220).

Almost surely, 2^{1540258138439} is an apocalyptic number.

1540258138439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540258138439 is an equidigital number, since it uses as much as digits as its factorization.

1540258138439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 1540258138439 in words is "one trillion, five hundred forty billion, two hundred fifty-eight million, one hundred thirty-eight thousand, four hundred thirty-nine".