64325641 has 4 divisors (see below), whose sum is σ = 67122432. Its totient is φ = 61528852.

The previous prime is 64325609. The next prime is 64325669. The reversal of 64325641 is 14652346.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14652346 = 2 ⋅7326173.

It is a cyclic number.

It is not a de Polignac number, because 64325641 - 2⁵ = 64325609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64325141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398361 + ... + 1398406.

It is an arithmetic number, because the mean of its divisors is an integer number (16780608).

Almost surely, 2^64325641 is an apocalyptic number.

64325641 is the 5073-rd centered pentagonal number.

It is an amenable number.

64325641 is a deficient number, since it is larger than the sum of its proper divisors (2796791).

64325641 is a wasteful number, since it uses less digits than its factorization.

64325641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796790.

The product of its digits is 17280, while the sum is 31.

The square root of 64325641 is about 8020.3267389802. The cubic root of 64325641 is about 400.6772713615.

Adding to 64325641 its reverse (14652346), we get a palindrome (78977987).

The spelling of 64325641 in words is "sixty-four million, three hundred twenty-five thousand, six hundred forty-one".