63434401321 has 4 divisors (see below), whose sum is σ = 65621794500. Its totient is φ = 61247008144.

The previous prime is 63434401309. The next prime is 63434401351. The reversal of 63434401321 is 12310443436.

63434401321 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.

It can be written as a sum of positive squares in 2 ways, for example, as 18288775696 + 45145625625 = 135236^2 + 212475^2 .

It is a cyclic number.

It is not a de Polignac number, because 63434401321 - 2¹⁵ = 63434368553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63434401351) 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, 1093696546 + ... + 1093696603.

It is an arithmetic number, because the mean of its divisors is an integer number (16405448625).

Almost surely, 2^63434401321 is an apocalyptic number.

It is an amenable number.

63434401321 is a deficient number, since it is larger than the sum of its proper divisors (2187393179).

63434401321 is a wasteful number, since it uses less digits than its factorization.

63434401321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187393178.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 63434401321 its reverse (12310443436), we get a palindrome (75744844757).

The spelling of 63434401321 in words is "sixty-three billion, four hundred thirty-four million, four hundred one thousand, three hundred twenty-one".