64555939 has 8 divisors (see below), whose sum is σ = 77661440. Its totient is φ = 52421256.

The previous prime is 64555913. The next prime is 64555951. The reversal of 64555939 is 93955546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64555939 - 2¹¹ = 64553891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64555339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242559 + ... + 242824.

It is an arithmetic number, because the mean of its divisors is an integer number (9707680).

Almost surely, 2^64555939 is an apocalyptic number.

64555939 is a deficient number, since it is larger than the sum of its proper divisors (13105501).

64555939 is a wasteful number, since it uses less digits than its factorization.

64555939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485409.

The product of its digits is 729000, while the sum is 46.

The square root of 64555939 is about 8034.6710573613. The cubic root of 64555939 is about 401.1548687366.

The spelling of 64555939 in words is "sixty-four million, five hundred fifty-five thousand, nine hundred thirty-nine".