64432216511 has 40 divisors (see below), whose sum is σ = 74545037424. Its totient is φ = 55495165440.

The previous prime is 64432216489. The next prime is 64432216523. The reversal of 64432216511 is 11561223446.

It is not a de Polignac number, because 64432216511 - 2³⁰ = 63358474687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64432216531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63604841 + ... + 63605853.

Almost surely, 2^64432216511 is an apocalyptic number.

64432216511 is a deficient number, since it is larger than the sum of its proper divisors (10112820913).

64432216511 is a wasteful number, since it uses less digits than its factorization.

64432216511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1174 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

Adding to 64432216511 its reverse (11561223446), we get a palindrome (75993439957).

The spelling of 64432216511 in words is "sixty-four billion, four hundred thirty-two million, two hundred sixteen thousand, five hundred eleven".