645463230634 has 8 divisors (see below), whose sum is σ = 968198972580. Its totient is φ = 322730239776.

The previous prime is 645463230619. The next prime is 645463230637. The reversal of 645463230634 is 436032364546.

It can be written as a sum of positive squares in 2 ways, for example, as 623365516225 + 22097714409 = 789535^2 + 148653^2 .

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

It is not an unprimeable number, because it can be changed into a prime (645463230637) by changing a digit.

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, 62452 + ... + 1137904.

Almost surely, 2^645463230634 is an apocalyptic number.

645463230634 is a deficient number, since it is larger than the sum of its proper divisors (322735741946).

645463230634 is a wasteful number, since it uses less digits than its factorization.

645463230634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375544.

The product of its (nonzero) digits is 3732480, while the sum is 46.

The spelling of 645463230634 in words is "six hundred forty-five billion, four hundred sixty-three million, two hundred thirty thousand, six hundred thirty-four".