645835063 has 8 divisors (see below), whose sum is σ = 657844560. Its totient is φ = 633861120.

The previous prime is 645835031. The next prime is 645835079. The reversal of 645835063 is 360538546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645835063 - 2⁵ = 645835031 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 (645835363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29281 + ... + 46357.

It is an arithmetic number, because the mean of its divisors is an integer number (82230570).

Almost surely, 2^645835063 is an apocalyptic number.

645835063 is a deficient number, since it is larger than the sum of its proper divisors (12009497).

645835063 is a wasteful number, since it uses less digits than its factorization.

645835063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17777.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 645835063 is about 25413.2851674080. The cubic root of 645835063 is about 864.3849696022.

The spelling of 645835063 in words is "six hundred forty-five million, eight hundred thirty-five thousand, sixty-three".