64626321 has 8 divisors (see below), whose sum is σ = 86418144. Its totient is φ = 42959360.

The previous prime is 64626311. The next prime is 64626329. The reversal of 64626321 is 12362646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64626321 - 2⁹ = 64625809 is a prime.

It is a super-2 number, since 2×64626321² = 8353122731990082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64626329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30000 + ... + 32081.

It is an arithmetic number, because the mean of its divisors is an integer number (10802268).

Almost surely, 2^64626321 is an apocalyptic number.

It is an amenable number.

64626321 is a deficient number, since it is larger than the sum of its proper divisors (21791823).

64626321 is a wasteful number, since it uses less digits than its factorization.

64626321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62431.

The product of its digits is 10368, while the sum is 30.

The square root of 64626321 is about 8039.0497572785. The cubic root of 64626321 is about 401.3006019198.

Adding to 64626321 its reverse (12362646), we get a palindrome (76988967).

The spelling of 64626321 in words is "sixty-four million, six hundred twenty-six thousand, three hundred twenty-one".