645476146 has 16 divisors (see below), whose sum is σ = 1110096000. Its totient is φ = 275741280.

The previous prime is 645476119. The next prime is 645476159. The reversal of 645476146 is 641674546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69771 + ... + 78478.

It is an arithmetic number, because the mean of its divisors is an integer number (69381000).

Almost surely, 2^645476146 is an apocalyptic number.

645476146 is a deficient number, since it is larger than the sum of its proper divisors (464619854).

645476146 is a wasteful number, since it uses less digits than its factorization.

645476146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148569.

The product of its digits is 483840, while the sum is 43.

The square root of 645476146 is about 25406.2225842411. Note that the first 3 decimals coincide. The cubic root of 645476146 is about 864.2248152185.

The spelling of 645476146 in words is "six hundred forty-five million, four hundred seventy-six thousand, one hundred forty-six".