64481020556 has 24 divisors (see below), whose sum is σ = 118852230000. Its totient is φ = 30525280704.

The previous prime is 64481020501. The next prime is 64481020567. The reversal of 64481020556 is 65502018446.

It is an unprimeable number.

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, 127331 + ... + 381018.

It is an arithmetic number, because the mean of its divisors is an integer number (4952176250).

Almost surely, 2^64481020556 is an apocalyptic number.

It is an amenable number.

64481020556 is a deficient number, since it is larger than the sum of its proper divisors (54371209444).

64481020556 is a wasteful number, since it uses less digits than its factorization.

64481020556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510041 (or 510039 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 64481020556 in words is "sixty-four billion, four hundred eighty-one million, twenty thousand, five hundred fifty-six".