645323347061103 has 4 divisors (see below), whose sum is σ = 860431129414808. Its totient is φ = 430215564707400.

The previous prime is 645323347061069. The next prime is 645323347061149. The reversal of 645323347061103 is 301160743323546.

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

It is not a de Polignac number, because 645323347061103 - 2¹⁶ = 645323346995567 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 (645323347061803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107553891176848 + ... + 107553891176853.

It is an arithmetic number, because the mean of its divisors is an integer number (215107782353702).

Almost surely, 2^{645323347061103} is an apocalyptic number.

645323347061103 is a deficient number, since it is larger than the sum of its proper divisors (215107782353705).

645323347061103 is a wasteful number, since it uses less digits than its factorization.

645323347061103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215107782353704.

The product of its (nonzero) digits is 3265920, while the sum is 48.

The spelling of 645323347061103 in words is "six hundred forty-five trillion, three hundred twenty-three billion, three hundred forty-seven million, sixty-one thousand, one hundred three".