1540204151069 has 2 divisors, whose sum is σ = 1540204151070. Its totient is φ = 1540204151068.

The previous prime is 1540204151047. The next prime is 1540204151137. The reversal of 1540204151069 is 9601514020451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1539572232025 + 631919044 = 1240795^2 + 25138^2 .

It is an emirp because it is prime and its reverse (9601514020451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540204151069 - 2¹² = 1540204146973 is a prime.

It is a super-2 number, since 2×1540204151069² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540204151569) 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, 770102075534 + 770102075535.

It is an arithmetic number, because the mean of its divisors is an integer number (770102075535).

Almost surely, 2^{1540204151069} is an apocalyptic number.

It is an amenable number.

1540204151069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540204151069 is an equidigital number, since it uses as much as digits as its factorization.

1540204151069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 1540204151069 in words is "one trillion, five hundred forty billion, two hundred four million, one hundred fifty-one thousand, sixty-nine".