64218475 has 6 divisors (see below), whose sum is σ = 79630940. Its totient is φ = 51374760.

The previous prime is 64218467. The next prime is 64218481. The reversal of 64218475 is 57481246.

It is not a de Polignac number, because 64218475 - 2³ = 64218467 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1284345 + ... + 1284394.

Almost surely, 2^64218475 is an apocalyptic number.

64218475 is a deficient number, since it is larger than the sum of its proper divisors (15412465).

64218475 is a wasteful number, since it uses less digits than its factorization.

64218475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568749 (or 2568744 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 64218475 is about 8013.6430541920. The cubic root of 64218475 is about 400.4546393120.

The spelling of 64218475 in words is "sixty-four million, two hundred eighteen thousand, four hundred seventy-five".