645435233083 has 4 divisors (see below), whose sum is σ = 645438178008. Its totient is φ = 645432288160.

The previous prime is 645435232991. The next prime is 645435233137. The reversal of 645435233083 is 380332534546.

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

It is a cyclic number.

It is not a de Polignac number, because 645435233083 - 2²⁵ = 645401678651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645435233483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114741 + ... + 1591702.

It is an arithmetic number, because the mean of its divisors is an integer number (161359544502).

Almost surely, 2^645435233083 is an apocalyptic number.

645435233083 is a deficient number, since it is larger than the sum of its proper divisors (2944925).

645435233083 is a wasteful number, since it uses less digits than its factorization.

645435233083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944924.

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 645435233083 in words is "six hundred forty-five billion, four hundred thirty-five million, two hundred thirty-three thousand, eighty-three".