63126728668 has 24 divisors (see below), whose sum is σ = 111908759760. Its totient is φ = 31153518720.

The previous prime is 63126728647. The next prime is 63126728681. The reversal of 63126728668 is 86682762136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262648 + ... + 441856.

It is an arithmetic number, because the mean of its divisors is an integer number (4662864990).

Almost surely, 2^63126728668 is an apocalyptic number.

It is an amenable number.

63126728668 is a deficient number, since it is larger than the sum of its proper divisors (48782031092).

63126728668 is a wasteful number, since it uses less digits than its factorization.

63126728668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180357 (or 180355 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

The spelling of 63126728668 in words is "sixty-three billion, one hundred twenty-six million, seven hundred twenty-eight thousand, six hundred sixty-eight".