128942604259678 has 24 divisors (see below), whose sum is σ = 212731817996880. Its totient is φ = 58572679704000.

The previous prime is 128942604259639. The next prime is 128942604259727. The reversal of 128942604259678 is 876952406249821.

It is a super-2 number, since 2×128942604259678² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128942604259678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170508123 + ... + 171262678.

It is an arithmetic number, because the mean of its divisors is an integer number (8863825749870).

Almost surely, 2^{128942604259678} is an apocalyptic number.

128942604259678 is a deficient number, since it is larger than the sum of its proper divisors (83789213737202).

128942604259678 is a wasteful number, since it uses less digits than its factorization.

128942604259678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341772384 (or 341772373 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 73.

The spelling of 128942604259678 in words is "one hundred twenty-eight trillion, nine hundred forty-two billion, six hundred four million, two hundred fifty-nine thousand, six hundred seventy-eight".