645393134 has 8 divisors (see below), whose sum is σ = 1025036208. Its totient is φ = 303714400.

The previous prime is 645393113. The next prime is 645393157. The reversal of 645393134 is 431393546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9491042 + ... + 9491109.

It is an arithmetic number, because the mean of its divisors is an integer number (128129526).

Almost surely, 2^645393134 is an apocalyptic number.

645393134 is a deficient number, since it is larger than the sum of its proper divisors (379643074).

645393134 is a wasteful number, since it uses less digits than its factorization.

645393134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18982170.

The product of its digits is 116640, while the sum is 38.

The square root of 645393134 is about 25404.5888374522. The cubic root of 645393134 is about 864.1877655116.

The spelling of 645393134 in words is "six hundred forty-five million, three hundred ninety-three thousand, one hundred thirty-four".