64536143 has 4 divisors (see below), whose sum is σ = 73755600. Its totient is φ = 55316688.

The previous prime is 64536119. The next prime is 64536167. The reversal of 64536143 is 34163546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34163546 = 2 ⋅17081773.

It is an interprime number because it is at equal distance from previous prime (64536119) and next prime (64536167).

It is not a de Polignac number, because 64536143 - 2¹⁸ = 64273999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64536113) 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 3 ways as a sum of consecutive naturals, for example, 4609718 + ... + 4609731.

It is an arithmetic number, because the mean of its divisors is an integer number (18438900).

Almost surely, 2^64536143 is an apocalyptic number.

64536143 is a deficient number, since it is larger than the sum of its proper divisors (9219457).

64536143 is an equidigital number, since it uses as much as digits as its factorization.

64536143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219456.

The product of its digits is 25920, while the sum is 32.

The square root of 64536143 is about 8033.4390518632. The cubic root of 64536143 is about 401.1138599941.

Adding to 64536143 its reverse (34163546), we get a palindrome (98699689).

The spelling of 64536143 in words is "sixty-four million, five hundred thirty-six thousand, one hundred forty-three".