64481613 has 8 divisors (see below), whose sum is σ = 98257728. Its totient is φ = 36846624.

The previous prime is 64481609. The next prime is 64481633. The reversal of 64481613 is 31618446.

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

It is not a de Polignac number, because 64481613 - 2² = 64481609 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64481633) 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, 1535256 + ... + 1535297.

It is an arithmetic number, because the mean of its divisors is an integer number (12282216).

Almost surely, 2^64481613 is an apocalyptic number.

It is an amenable number.

64481613 is a deficient number, since it is larger than the sum of its proper divisors (33776115).

64481613 is a wasteful number, since it uses less digits than its factorization.

64481613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070563.

The product of its digits is 13824, while the sum is 33.

The square root of 64481613 is about 8030.0443958922. The cubic root of 64481613 is about 401.0008540559. Note that the first 3 decimals are identical.

The spelling of 64481613 in words is "sixty-four million, four hundred eighty-one thousand, six hundred thirteen".