64134543028 has 6 divisors (see below), whose sum is σ = 112235450306. Its totient is φ = 32067271512.

The previous prime is 64134543013. The next prime is 64134543029. The reversal of 64134543028 is 82034543146.

It can be written as a sum of positive squares in only one way, i.e., 35761835664 + 28372707364 = 189108^2 + 168442^2 .

It is a super-2 number, since 2×64134543028² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64134543029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8016817875 + ... + 8016817882.

Almost surely, 2^64134543028 is an apocalyptic number.

It is an amenable number.

64134543028 is a deficient number, since it is larger than the sum of its proper divisors (48100907278).

64134543028 is a wasteful number, since it uses less digits than its factorization.

64134543028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16033635761 (or 16033635759 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 64134543028 in words is "sixty-four billion, one hundred thirty-four million, five hundred forty-three thousand, twenty-eight".