1645742562103 has 2 divisors, whose sum is σ = 1645742562104. Its totient is φ = 1645742562102.

The previous prime is 1645742562091. The next prime is 1645742562227. The reversal of 1645742562103 is 3012652475461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1645742562103 - 2²⁵ = 1645709007671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645742562703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822871281051 + 822871281052.

It is an arithmetic number, because the mean of its divisors is an integer number (822871281052).

Almost surely, 2^{1645742562103} is an apocalyptic number.

1645742562103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645742562103 is an equidigital number, since it uses as much as digits as its factorization.

1645742562103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 1645742562103 in words is "one trillion, six hundred forty-five billion, seven hundred forty-two million, five hundred sixty-two thousand, one hundred three".