1645564514063 has 4 divisors (see below), whose sum is σ = 1670125178520. Its totient is φ = 1621003849608.

The previous prime is 1645564514051. The next prime is 1645564514177. The reversal of 1645564514063 is 3604154655461.

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-1645564514063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645564514563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12280332128 + ... + 12280332261.

It is an arithmetic number, because the mean of its divisors is an integer number (417531294630).

Almost surely, 2^{1645564514063} is an apocalyptic number.

1645564514063 is a deficient number, since it is larger than the sum of its proper divisors (24560664457).

1645564514063 is an equidigital number, since it uses as much as digits as its factorization.

1645564514063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24560664456.

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 1645564514063 in words is "one trillion, six hundred forty-five billion, five hundred sixty-four million, five hundred fourteen thousand, sixty-three".