64772945 has 16 divisors (see below), whose sum is σ = 82259712. Its totient is φ = 48861120.

The previous prime is 64772933. The next prime is 64772947. The reversal of 64772945 is 54927746.

It is not a de Polignac number, because 64772945 - 2¹² = 64768849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64772896 and 64772905.

It is not an unprimeable number, because it can be changed into a prime (64772947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4199 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (5141232).

Almost surely, 2^64772945 is an apocalyptic number.

It is an amenable number.

64772945 is a deficient number, since it is larger than the sum of its proper divisors (17486767).

64772945 is a wasteful number, since it uses less digits than its factorization.

64772945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8032.

The product of its digits is 423360, while the sum is 44.

The square root of 64772945 is about 8048.1640763593. The cubic root of 64772945 is about 401.6038625503.

The spelling of 64772945 in words is "sixty-four million, seven hundred seventy-two thousand, nine hundred forty-five".