64478016 has 168 divisors, whose sum is σ = 200338944. Its totient is φ = 19768320.

The previous prime is 64478009. The next prime is 64478023. The reversal of 64478016 is 61087446.

64478016 is a `hidden beast` number, since 644 + 7 + 8 + 0 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (64478009) and next prime (64478023).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410610 + ... + 410766.

Almost surely, 2^64478016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64478016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100169472).

64478016 is an abundant number, since it is smaller than the sum of its proper divisors (135860928).

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

64478016 is a wasteful number, since it uses less digits than its factorization.

64478016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 64478016 is about 8029.8204214042. The cubic root of 64478016 is about 400.9933975277.

The spelling of 64478016 in words is "sixty-four million, four hundred seventy-eight thousand, sixteen".