64218474 has 16 divisors (see below), whose sum is σ = 142707840. Its totient is φ = 21406140.

The previous prime is 64218467. The next prime is 64218481. The reversal of 64218474 is 47481246.

64218474 is a `hidden beast` number, since 642 + 1 + 8 + 4 + 7 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (64218467) and next prime (64218481).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594562 + ... + 594669.

It is an arithmetic number, because the mean of its divisors is an integer number (8919240).

Almost surely, 2^64218474 is an apocalyptic number.

64218474 is an abundant number, since it is smaller than the sum of its proper divisors (78489366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64218474 is a wasteful number, since it uses less digits than its factorization.

64218474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189242 (or 1189236 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 64218474 is about 8013.6429917984. The cubic root of 64218474 is about 400.4546372334.

The spelling of 64218474 in words is "sixty-four million, two hundred eighteen thousand, four hundred seventy-four".