6481062721668 has 48 divisors (see below), whose sum is σ = 15474783779840. Its totient is φ = 2110029100704.

The previous prime is 6481062721657. The next prime is 6481062721697. The reversal of 6481062721668 is 8661272601846.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13388193 + ... + 13863831.

Almost surely, 2^{6481062721668} is an apocalyptic number.

It is an amenable number.

6481062721668 is an abundant number, since it is smaller than the sum of its proper divisors (8993721058172).

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

6481062721668 is a wasteful number, since it uses less digits than its factorization.

6481062721668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502096 (or 502094 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 6481062721668 in words is "six trillion, four hundred eighty-one billion, sixty-two million, seven hundred twenty-one thousand, six hundred sixty-eight".