64644113 has 4 divisors (see below), whose sum is σ = 64733760. Its totient is φ = 64554468.

The previous prime is 64644101. The next prime is 64644119. The reversal of 64644113 is 31144646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64644113 - 2⁶ = 64644049 is a prime.

It is a super-2 number, since 2×64644113² = 8357722691113538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64644119) 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, 43733 + ... + 45186.

It is an arithmetic number, because the mean of its divisors is an integer number (16183440).

Almost surely, 2^64644113 is an apocalyptic number.

It is an amenable number.

64644113 is a deficient number, since it is larger than the sum of its proper divisors (89647).

64644113 is an equidigital number, since it uses as much as digits as its factorization.

64644113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89646.

The product of its digits is 6912, while the sum is 29.

The square root of 64644113 is about 8040.1562795757. The cubic root of 64644113 is about 401.3374253332.

Adding to 64644113 its reverse (31144646), we get a palindrome (95788759).

The spelling of 64644113 in words is "sixty-four million, six hundred forty-four thousand, one hundred thirteen".