645523334 has 8 divisors (see below), whose sum is σ = 971029080. Its totient is φ = 321846976.

The previous prime is 645523301. The next prime is 645523363. The reversal of 645523334 is 433325546.

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

It is a junction number, because it is equal to n+sod(n) for n = 645523294 and 645523303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456464 + ... + 457875.

It is an arithmetic number, because the mean of its divisors is an integer number (121378635).

Almost surely, 2^645523334 is an apocalyptic number.

645523334 is a deficient number, since it is larger than the sum of its proper divisors (325505746).

645523334 is a wasteful number, since it uses less digits than its factorization.

645523334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914694.

The product of its digits is 129600, while the sum is 35.

The square root of 645523334 is about 25407.1512373977. The cubic root of 645523334 is about 864.2458746318.

The spelling of 645523334 in words is "six hundred forty-five million, five hundred twenty-three thousand, three hundred thirty-four".