64441775 has 6 divisors (see below), whose sum is σ = 79907832. Its totient is φ = 51553400.

The previous prime is 64441703. The next prime is 64441829. The reversal of 64441775 is 57714446.

It is a happy number.

It is not a de Polignac number, because 64441775 - 2⁸ = 64441519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1288811 + ... + 1288860.

It is an arithmetic number, because the mean of its divisors is an integer number (13317972).

Almost surely, 2^64441775 is an apocalyptic number.

64441775 is a deficient number, since it is larger than the sum of its proper divisors (15466057).

64441775 is a wasteful number, since it uses less digits than its factorization.

64441775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577681 (or 2577676 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 64441775 is about 8027.5634535019. The cubic root of 64441775 is about 400.9182549897.

The spelling of 64441775 in words is "sixty-four million, four hundred forty-one thousand, seven hundred seventy-five".