634534645 has 16 divisors (see below), whose sum is σ = 808994160. Its totient is φ = 476872704.

The previous prime is 634534643. The next prime is 634534651. The reversal of 634534645 is 546435436.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6380676 + 628153969 = 2526^2 + 25063^2 .

It is a cyclic number.

It is not a de Polignac number, because 634534645 - 2¹ = 634534643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634534598 and 634534607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634534643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53772 + ... + 64501.

It is an arithmetic number, because the mean of its divisors is an integer number (50562135).

Almost surely, 2^634534645 is an apocalyptic number.

It is an amenable number.

634534645 is a deficient number, since it is larger than the sum of its proper divisors (174459515).

634534645 is a wasteful number, since it uses less digits than its factorization.

634534645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118344.

The product of its digits is 518400, while the sum is 40.

The square root of 634534645 is about 25189.9711194753. The cubic root of 634534645 is about 859.3137869259.

The spelling of 634534645 in words is "six hundred thirty-four million, five hundred thirty-four thousand, six hundred forty-five".