64955945 has 4 divisors (see below), whose sum is σ = 77947140. Its totient is φ = 51964752.

The previous prime is 64955939. The next prime is 64955959. The reversal of 64955945 is 54955946.

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 24098281 + 40857664 = 4909^2 + 6392^2 .

It is a cyclic number.

It is not a de Polignac number, because 64955945 - 2⁸ = 64955689 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64955945.

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, 6495590 + ... + 6495599.

It is an arithmetic number, because the mean of its divisors is an integer number (19486785).

Almost surely, 2^64955945 is an apocalyptic number.

It is an amenable number.

64955945 is a deficient number, since it is larger than the sum of its proper divisors (12991195).

64955945 is a wasteful number, since it uses less digits than its factorization.

64955945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12991194.

The product of its digits is 972000, while the sum is 47.

The square root of 64955945 is about 8059.5251100794. The cubic root of 64955945 is about 401.9817178554.

Subtracting from 64955945 its reverse (54955946), we obtain a palindrome (9999999).

The spelling of 64955945 in words is "sixty-four million, nine hundred fifty-five thousand, nine hundred forty-five".