8128406663542 has 16 divisors (see below), whose sum is σ = 13625444430864. Its totient is φ = 3604614928000.

The previous prime is 8128406663471. The next prime is 8128406663561. The reversal of 8128406663542 is 2453666048218.

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, 4505767759 + ... + 4505769562.

It is an arithmetic number, because the mean of its divisors is an integer number (851590276929).

Almost surely, 2^{8128406663542} is an apocalyptic number.

8128406663542 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8128406663542 is a deficient number, since it is larger than the sum of its proper divisors (5497037767322).

8128406663542 is a wasteful number, since it uses less digits than its factorization.

8128406663542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011537375.

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 8128406663542 in words is "eight trillion, one hundred twenty-eight billion, four hundred six million, six hundred sixty-three thousand, five hundred forty-two".