645164366 has 32 divisors (see below), whose sum is σ = 1218516480. Its totient is φ = 248868000.

The previous prime is 645164353. The next prime is 645164369. The reversal of 645164366 is 663461546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645164369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5186 + ... + 36293.

It is an arithmetic number, because the mean of its divisors is an integer number (38078640).

Almost surely, 2^645164366 is an apocalyptic number.

645164366 is a deficient number, since it is larger than the sum of its proper divisors (573352114).

645164366 is a wasteful number, since it uses less digits than its factorization.

645164366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41600.

The product of its digits is 311040, while the sum is 41.

The square root of 645164366 is about 25400.0859447365. The cubic root of 645164366 is about 864.0856459095.

The spelling of 645164366 in words is "six hundred forty-five million, one hundred sixty-four thousand, three hundred sixty-six".