643461014323 has 4 divisors (see below), whose sum is σ = 643471175200. Its totient is φ = 643450853448.

The previous prime is 643461014309. The next prime is 643461014341. The reversal of 643461014323 is 323410164346.

643461014323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323410164346 = 2 ⋅161705082173.

It is a cyclic number.

It is not a de Polignac number, because 643461014323 - 2³⁷ = 506022060851 is a prime.

It is a super-2 number, since 2×643461014323² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643461014723) 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, 4984848 + ... + 5112301.

It is an arithmetic number, because the mean of its divisors is an integer number (160867793800).

Almost surely, 2^643461014323 is an apocalyptic number.

643461014323 is a deficient number, since it is larger than the sum of its proper divisors (10160877).

643461014323 is a wasteful number, since it uses less digits than its factorization.

643461014323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10160876.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 643461014323 its reverse (323410164346), we get a palindrome (966871178669).

The spelling of 643461014323 in words is "six hundred forty-three billion, four hundred sixty-one million, fourteen thousand, three hundred twenty-three".