64651445 has 4 divisors (see below), whose sum is σ = 77581740. Its totient is φ = 51721152.

The previous prime is 64651427. The next prime is 64651451. The reversal of 64651445 is 54415646.

64651445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54415646 = 2 ⋅27207823.

It can be written as a sum of positive squares in 2 ways, for example, as 32649796 + 32001649 = 5714^2 + 5657^2 .

It is a cyclic number.

It is not a de Polignac number, because 64651445 - 2¹⁴ = 64635061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6465140 + ... + 6465149.

It is an arithmetic number, because the mean of its divisors is an integer number (19395435).

Almost surely, 2^64651445 is an apocalyptic number.

It is an amenable number.

64651445 is a deficient number, since it is larger than the sum of its proper divisors (12930295).

64651445 is a wasteful number, since it uses less digits than its factorization.

64651445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12930294.

The product of its digits is 57600, while the sum is 35.

The square root of 64651445 is about 8040.6122279339. The cubic root of 64651445 is about 401.3525981237.

The spelling of 64651445 in words is "sixty-four million, six hundred fifty-one thousand, four hundred forty-five".