645083416 has 16 divisors (see below), whose sum is σ = 1211943600. Its totient is φ = 321898464.

The previous prime is 645083401. The next prime is 645083429. The reversal of 645083416 is 614380546.

It is a happy number.

It is a super-2 number, since 2×645083416² = 832265227196458112, which 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76131 + ... + 84178.

It is an arithmetic number, because the mean of its divisors is an integer number (75746475).

Almost surely, 2^645083416 is an apocalyptic number.

It is an amenable number.

645083416 is a deficient number, since it is larger than the sum of its proper divisors (566860184).

645083416 is a wasteful number, since it uses less digits than its factorization.

645083416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160818 (or 160814 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 645083416 is about 25398.4923962034. The cubic root of 645083416 is about 864.0495049081.

The spelling of 645083416 in words is "six hundred forty-five million, eighty-three thousand, four hundred sixteen".