64655645 has 16 divisors (see below), whose sum is σ = 83756160. Its totient is φ = 47767104.

The previous prime is 64655629. The next prime is 64655659. The reversal of 64655645 is 54655646.

It is a cyclic number.

It is not a de Polignac number, because 64655645 - 2⁴ = 64655629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6359 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (5234760).

Almost surely, 2^64655645 is an apocalyptic number.

It is an amenable number.

64655645 is a deficient number, since it is larger than the sum of its proper divisors (19100515).

64655645 is a wasteful number, since it uses less digits than its factorization.

64655645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444.

The product of its digits is 432000, while the sum is 41.

The square root of 64655645 is about 8040.8733978343. The cubic root of 64655645 is about 401.3612890581.

Subtracting from 64655645 its reverse (54655646), we obtain a palindrome (9999999).

The spelling of 64655645 in words is "sixty-four million, six hundred fifty-five thousand, six hundred forty-five".