6388145981456 has 20 divisors (see below), whose sum is σ = 12408850416300. Its totient is φ = 3185862003072.

The previous prime is 6388145981449. The next prime is 6388145981509. The reversal of 6388145981456 is 6541895418836.

It can be written as a sum of positive squares in 2 ways, for example, as 3008490250000 + 3379655731456 = 1734500^2 + 1838384^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513180311 + ... + 513192758.

It is an arithmetic number, because the mean of its divisors is an integer number (620442520815).

Almost surely, 2^{6388145981456} is an apocalyptic number.

It is an amenable number.

6388145981456 is a deficient number, since it is larger than the sum of its proper divisors (6020704434844).

6388145981456 is a wasteful number, since it uses less digits than its factorization.

6388145981456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026373466 (or 1026373460 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 68.

The spelling of 6388145981456 in words is "six trillion, three hundred eighty-eight billion, one hundred forty-five million, nine hundred eighty-one thousand, four hundred fifty-six".