645065304630 has 32 divisors (see below), whose sum is σ = 1549016470368. Its totient is φ = 171921888000.

The previous prime is 645065304607. The next prime is 645065304673. The reversal of 645065304630 is 36403560546.

It is a happy number.

It is a super-2 number, since 2×645065304630² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5915481 + ... + 6023540.

It is an arithmetic number, because the mean of its divisors is an integer number (48406764699).

Almost surely, 2^645065304630 is an apocalyptic number.

645065304630 is an abundant number, since it is smaller than the sum of its proper divisors (903951165738).

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

645065304630 is a wasteful number, since it uses less digits than its factorization.

645065304630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11940832.

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 645065304630 in words is "six hundred forty-five billion, sixty-five million, three hundred four thousand, six hundred thirty".