645173462 has 32 divisors (see below), whose sum is σ = 1050931200. Its totient is φ = 296055648.

The previous prime is 645173449. The next prime is 645173479. The reversal of 645173462 is 264371546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205964 + ... + 209072.

It is an arithmetic number, because the mean of its divisors is an integer number (32841600).

Almost surely, 2^645173462 is an apocalyptic number.

645173462 is a deficient number, since it is larger than the sum of its proper divisors (405757738).

645173462 is a wasteful number, since it uses less digits than its factorization.

645173462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300.

The product of its digits is 120960, while the sum is 38.

The square root of 645173462 is about 25400.2649986176. The cubic root of 645173462 is about 864.0897067279.

The spelling of 645173462 in words is "six hundred forty-five million, one hundred seventy-three thousand, four hundred sixty-two".