64463121 has 20 divisors (see below), whose sum is σ = 96513472. Its totient is φ = 42878808.

The previous prime is 64463081. The next prime is 64463129. The reversal of 64463121 is 12136446.

64463121 is a `hidden beast` number, since 6 + 4 + 4 + 631 + 21 = 666.

64463121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64463121 - 2¹¹ = 64461073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64463129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 66180 + ... + 67146.

Almost surely, 2^64463121 is an apocalyptic number.

It is an amenable number.

64463121 is a deficient number, since it is larger than the sum of its proper divisors (32050351).

64463121 is an equidigital number, since it uses as much as digits as its factorization.

64463121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1793 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 64463121 is about 8028.8928875655. The cubic root of 64463121 is about 400.9625174593.

Adding to 64463121 its reverse (12136446), we get a palindrome (76599567).

The spelling of 64463121 in words is "sixty-four million, four hundred sixty-three thousand, one hundred twenty-one".