645463662 has 16 divisors (see below), whose sum is σ = 1310195712. Its totient is φ = 211943160.

The previous prime is 645463661. The next prime is 645463673. The reversal of 645463662 is 266364546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645463661) 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 7 ways as a sum of consecutive naturals, for example, 802414 + ... + 803217.

It is an arithmetic number, because the mean of its divisors is an integer number (81887232).

Almost surely, 2^645463662 is an apocalyptic number.

645463662 is an abundant number, since it is smaller than the sum of its proper divisors (664732050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645463662 is a wasteful number, since it uses less digits than its factorization.

645463662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605703.

The product of its digits is 622080, while the sum is 42.

The square root of 645463662 is about 25405.9768952111. The cubic root of 645463662 is about 864.2192435940.

The spelling of 645463662 in words is "six hundred forty-five million, four hundred sixty-three thousand, six hundred sixty-two".