1945139563043 has 2 divisors, whose sum is σ = 1945139563044. Its totient is φ = 1945139563042.

The previous prime is 1945139563019. The next prime is 1945139563141. The reversal of 1945139563043 is 3403659315491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1945139563043 - 2⁶ = 1945139562979 is a prime.

It is a super-2 number, since 2×1945139563043² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1945139560043) 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, 972569781521 + 972569781522.

It is an arithmetic number, because the mean of its divisors is an integer number (972569781522).

Almost surely, 2^{1945139563043} is an apocalyptic number.

1945139563043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945139563043 is an equidigital number, since it uses as much as digits as its factorization.

1945139563043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5248800, while the sum is 53.

The spelling of 1945139563043 in words is "one trillion, nine hundred forty-five billion, one hundred thirty-nine million, five hundred sixty-three thousand, forty-three".