1540378163 has 2 divisors, whose sum is σ = 1540378164. Its totient is φ = 1540378162.

The previous prime is 1540378153. The next prime is 1540378201. The reversal of 1540378163 is 3618730451.

It is an a-pointer prime, because the next prime (1540378201) can be obtained adding 1540378163 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1540378163 - 2⁸ = 1540377907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540378153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770189081 + 770189082.

It is an arithmetic number, because the mean of its divisors is an integer number (770189082).

Almost surely, 2^1540378163 is an apocalyptic number.

1540378163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540378163 is an equidigital number, since it uses as much as digits as its factorization.

1540378163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1540378163 is about 39247.6516877125. The cubic root of 1540378163 is about 1154.8948669634.

The spelling of 1540378163 in words is "one billion, five hundred forty million, three hundred seventy-eight thousand, one hundred sixty-three".