64416321 has 12 divisors (see below), whose sum is σ = 93125760. Its totient is φ = 42907320.

The previous prime is 64416301. The next prime is 64416323. The reversal of 64416321 is 12361446.

64416321 is a `hidden beast` number, since 644 + 16 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 64416321 - 2⁶ = 64416257 is a prime.

It is a super-2 number, since 2×64416321² = 8298924822350082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64416323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11736 + ... + 16326.

It is an arithmetic number, because the mean of its divisors is an integer number (7760480).

Almost surely, 2^64416321 is an apocalyptic number.

It is an amenable number.

64416321 is a deficient number, since it is larger than the sum of its proper divisors (28709439).

64416321 is a wasteful number, since it uses less digits than its factorization.

64416321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156 (or 6153 counting only the distinct ones).

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

The square root of 64416321 is about 8025.9778843453. The cubic root of 64416321 is about 400.8654615071.

Adding to 64416321 its reverse (12361446), we get a palindrome (76777767).

The spelling of 64416321 in words is "sixty-four million, four hundred sixteen thousand, three hundred twenty-one".