64478733 has 8 divisors (see below), whose sum is σ = 93787296. Its totient is φ = 39078000.

The previous prime is 64478731. The next prime is 64478737. The reversal of 64478733 is 33787446.

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

It is not a de Polignac number, because 64478733 - 2¹ = 64478731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64478731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 976918 + ... + 976983.

It is an arithmetic number, because the mean of its divisors is an integer number (11723412).

Almost surely, 2^64478733 is an apocalyptic number.

It is an amenable number.

64478733 is a deficient number, since it is larger than the sum of its proper divisors (29308563).

64478733 is a wasteful number, since it uses less digits than its factorization.

64478733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953915.

The product of its digits is 338688, while the sum is 42.

The square root of 64478733 is about 8029.8650673595. The cubic root of 64478733 is about 400.9948838803.

The spelling of 64478733 in words is "sixty-four million, four hundred seventy-eight thousand, seven hundred thirty-three".