1540005559 has 2 divisors, whose sum is σ = 1540005560. Its totient is φ = 1540005558.

The previous prime is 1540005553. The next prime is 1540005563. The reversal of 1540005559 is 9555000451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540005559 - 2¹¹ = 1540003511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540005553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770002779 + 770002780.

It is an arithmetic number, because the mean of its divisors is an integer number (770002780).

Almost surely, 2^1540005559 is an apocalyptic number.

1540005559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540005559 is an equidigital number, since it uses as much as digits as its factorization.

1540005559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 1540005559 is about 39242.9045688517. The cubic root of 1540005559 is about 1154.8017397996.

The spelling of 1540005559 in words is "one billion, five hundred forty million, five thousand, five hundred fifty-nine".