64645023 has 8 divisors (see below), whose sum is σ = 86276736. Its totient is φ = 43055000.

The previous prime is 64644997. The next prime is 64645027. The reversal of 64645023 is 32054646.

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 64645023 - 2⁹ = 64644511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64645027) 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, 6603 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (10784592).

Almost surely, 2^64645023 is an apocalyptic number.

64645023 is a deficient number, since it is larger than the sum of its proper divisors (21631713).

64645023 is a wasteful number, since it uses less digits than its factorization.

64645023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20845.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 64645023 is about 8040.2128703163. The cubic root of 64645023 is about 401.3393085433.

Adding to 64645023 its reverse (32054646), we get a palindrome (96699669).

The spelling of 64645023 in words is "sixty-four million, six hundred forty-five thousand, twenty-three".