64445603 has 2 divisors, whose sum is σ = 64445604. Its totient is φ = 64445602.

The previous prime is 64445551. The next prime is 64445611. The reversal of 64445603 is 30654446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64445603 - 2¹⁴ = 64429219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64445603.

It is not a weakly prime, because it can be changed into another prime (64445653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32222801 + 32222802.

It is an arithmetic number, because the mean of its divisors is an integer number (32222802).

Almost surely, 2^64445603 is an apocalyptic number.

64445603 is a deficient number, since it is larger than the sum of its proper divisors (1).

64445603 is an equidigital number, since it uses as much as digits as its factorization.

64445603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 64445603 is about 8027.8018784721. The cubic root of 64445603 is about 400.9261933428.

The spelling of 64445603 in words is "sixty-four million, four hundred forty-five thousand, six hundred three".