64543434495 has 8 divisors (see below), whose sum is σ = 103269495216. Its totient is φ = 34423165056.

The previous prime is 64543434493. The next prime is 64543434497. The reversal of 64543434495 is 59443434546.

It is an interprime number because it is at equal distance from previous prime (64543434493) and next prime (64543434497).

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

It is not a de Polignac number, because 64543434495 - 2¹ = 64543434493 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64543434493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151447802 + ... + 2151447831.

It is an arithmetic number, because the mean of its divisors is an integer number (12908686902).

Almost surely, 2^64543434495 is an apocalyptic number.

64543434495 is a deficient number, since it is larger than the sum of its proper divisors (38726060721).

64543434495 is a wasteful number, since it uses less digits than its factorization.

64543434495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302895641.

The product of its digits is 12441600, while the sum is 51.

Adding to 64543434495 its sum of digits (51), we get a palindrome (64543434546).

The spelling of 64543434495 in words is "sixty-four billion, five hundred forty-three million, four hundred thirty-four thousand, four hundred ninety-five".