64944655 has 4 divisors (see below), whose sum is σ = 77933592. Its totient is φ = 51955720.

The previous prime is 64944643. The next prime is 64944667. The reversal of 64944655 is 55644946.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64944643) and next prime (64944667).

It is not a de Polignac number, because 64944655 - 2¹³ = 64936463 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 3 ways as a sum of consecutive naturals, for example, 6494461 + ... + 6494470.

It is an arithmetic number, because the mean of its divisors is an integer number (19483398).

Almost surely, 2^64944655 is an apocalyptic number.

64944655 is a deficient number, since it is larger than the sum of its proper divisors (12988937).

64944655 is a wasteful number, since it uses less digits than its factorization.

64944655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12988936.

The product of its digits is 518400, while the sum is 43.

The square root of 64944655 is about 8058.8246661657. The cubic root of 64944655 is about 401.9584270103.

The spelling of 64944655 in words is "sixty-four million, nine hundred forty-four thousand, six hundred fifty-five".