64465645 has 4 divisors (see below), whose sum is σ = 77358780. Its totient is φ = 51572512.

The previous prime is 64465633. The next prime is 64465663. The reversal of 64465645 is 54656446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47375689 + 17089956 = 6883^2 + 4134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64465645 is a prime.

It is a super-3 number, since 3×64465645³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64465598 and 64465607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446560 + ... + 6446569.

It is an arithmetic number, because the mean of its divisors is an integer number (19339695).

Almost surely, 2^64465645 is an apocalyptic number.

It is an amenable number.

64465645 is a deficient number, since it is larger than the sum of its proper divisors (12893135).

64465645 is a wasteful number, since it uses less digits than its factorization.

64465645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12893134.

The product of its digits is 345600, while the sum is 40.

The square root of 64465645 is about 8029.0500683456. The cubic root of 64465645 is about 400.9677505092.

The spelling of 64465645 in words is "sixty-four million, four hundred sixty-five thousand, six hundred forty-five".