1645430334103 has 4 divisors (see below), whose sum is σ = 1645928801608. Its totient is φ = 1644931866600.

The previous prime is 1645430334077. The next prime is 1645430334109. The reversal of 1645430334103 is 3014330345461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645430334103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645430334109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249228801 + ... + 249235402.

It is an arithmetic number, because the mean of its divisors is an integer number (411482200402).

Almost surely, 2^{1645430334103} is an apocalyptic number.

1645430334103 is a deficient number, since it is larger than the sum of its proper divisors (498467505).

1645430334103 is an equidigital number, since it uses as much as digits as its factorization.

1645430334103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498467504.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 1645430334103 its reverse (3014330345461), we get a palindrome (4659760679564).

The spelling of 1645430334103 in words is "one trillion, six hundred forty-five billion, four hundred thirty million, three hundred thirty-four thousand, one hundred three".