64481020 has 12 divisors (see below), whose sum is σ = 135410184. Its totient is φ = 25792400.

The previous prime is 64481009. The next prime is 64481033. The reversal of 64481020 is 2018446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1612006 + ... + 1612045.

It is an arithmetic number, because the mean of its divisors is an integer number (11284182).

Almost surely, 2^64481020 is an apocalyptic number.

It is an amenable number.

64481020 is an abundant number, since it is smaller than the sum of its proper divisors (70929164).

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

64481020 is a wasteful number, since it uses less digits than its factorization.

64481020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224060 (or 3224058 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 64481020 is about 8030.0074719766. The cubic root of 64481020 is about 400.9996247947. Note that the first 3 decimals are identical.

Adding to 64481020 its reverse (2018446), we get a palindrome (66499466).

The spelling of 64481020 in words is "sixty-four million, four hundred eighty-one thousand, twenty".