64478481 has 8 divisors (see below), whose sum is σ = 88744704. Its totient is φ = 41598960.

The previous prime is 64478471. The next prime is 64478483. The reversal of 64478481 is 18487446.

It is a happy number.

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

It is not a de Polignac number, because 64478481 - 2⁶ = 64478417 is a prime.

It is a super-2 number, since 2×64478481² = 8314949024134722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64478483) 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, 346566 + ... + 346751.

It is an arithmetic number, because the mean of its divisors is an integer number (11093088).

Almost surely, 2^64478481 is an apocalyptic number.

It is an amenable number.

64478481 is a deficient number, since it is larger than the sum of its proper divisors (24266223).

64478481 is a wasteful number, since it uses less digits than its factorization.

64478481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693351.

The product of its digits is 172032, while the sum is 42.

The square root of 64478481 is about 8029.8493759223. The cubic root of 64478481 is about 400.9943614815.

The spelling of 64478481 in words is "sixty-four million, four hundred seventy-eight thousand, four hundred eighty-one".