1540981753 has 2 divisors, whose sum is σ = 1540981754. Its totient is φ = 1540981752.

The previous prime is 1540981703. The next prime is 1540981763. The reversal of 1540981753 is 3571890451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1510643689 + 30338064 = 38867^2 + 5508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540981753 - 2²⁵ = 1507427321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540981703) 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, 770490876 + 770490877.

It is an arithmetic number, because the mean of its divisors is an integer number (770490877).

Almost surely, 2^1540981753 is an apocalyptic number.

It is an amenable number.

1540981753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540981753 is an equidigital number, since it uses as much as digits as its factorization.

1540981753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 1540981753 is about 39255.3404392320. The cubic root of 1540981753 is about 1155.0456939875.

The spelling of 1540981753 in words is "one billion, five hundred forty million, nine hundred eighty-one thousand, seven hundred fifty-three".