645611304046 has 4 divisors (see below), whose sum is σ = 968416956072. Its totient is φ = 322805652022.

The previous prime is 645611304043. The next prime is 645611304049. The reversal of 645611304046 is 640403116546.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (645611304043) and next prime (645611304049).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645611304043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161402826010 + ... + 161402826013.

It is an arithmetic number, because the mean of its divisors is an integer number (242104239018).

Almost surely, 2^645611304046 is an apocalyptic number.

645611304046 is a deficient number, since it is larger than the sum of its proper divisors (322805652026).

645611304046 is a wasteful number, since it uses less digits than its factorization.

645611304046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322805652025.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 645611304046 in words is "six hundred forty-five billion, six hundred eleven million, three hundred four thousand, forty-six".