8543478634 has 8 divisors (see below), whose sum is σ = 12818695428. Its totient is φ = 4270580160.

The previous prime is 8543478631. The next prime is 8543478637. The reversal of 8543478634 is 4368743458.

It is an interprime number because it is at equal distance from previous prime (8543478631) and next prime (8543478637).

It can be written as a sum of positive squares in 2 ways, for example, as 8529076609 + 14402025 = 92353^2 + 3795^2 .

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

It is a super-2 number, since 2×8543478634² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8543478631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570337 + ... + 585124.

Almost surely, 2^8543478634 is an apocalyptic number.

8543478634 is a deficient number, since it is larger than the sum of its proper divisors (4275216794).

8543478634 is a wasteful number, since it uses less digits than its factorization.

8543478634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159160.

The product of its digits is 7741440, while the sum is 52.

The square root of 8543478634 is about 92430.9398091353. The cubic root of 8543478634 is about 2044.3013364466.

The spelling of 8543478634 in words is "eight billion, five hundred forty-three million, four hundred seventy-eight thousand, six hundred thirty-four".