634349545 has 32 divisors (see below), whose sum is σ = 818813952. Its totient is φ = 470619072.

The previous prime is 634349477. The next prime is 634349549. The reversal of 634349545 is 545943436.

It is a cyclic number.

It is not a de Polignac number, because 634349545 - 2²¹ = 632252393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634349549) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 805642 + ... + 806428.

It is an arithmetic number, because the mean of its divisors is an integer number (25587936).

Almost surely, 2^634349545 is an apocalyptic number.

It is an amenable number.

634349545 is a deficient number, since it is larger than the sum of its proper divisors (184464407).

634349545 is a wasteful number, since it uses less digits than its factorization.

634349545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its digits is 777600, while the sum is 43.

The square root of 634349545 is about 25186.2967702678. The cubic root of 634349545 is about 859.2302220372.

The spelling of 634349545 in words is "six hundred thirty-four million, three hundred forty-nine thousand, five hundred forty-five".