5678128921378 has 8 divisors (see below), whose sum is σ = 8517204023760. Its totient is φ = 2839060913460.

The previous prime is 5678128921363. The next prime is 5678128921379. The reversal of 5678128921378 is 8731298218765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×5678128921378² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5678128921379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276033 + ... + 3603403.

It is an arithmetic number, because the mean of its divisors is an integer number (1064650502970).

Almost surely, 2^{5678128921378} is an apocalyptic number.

5678128921378 is a deficient number, since it is larger than the sum of its proper divisors (2839075102382).

5678128921378 is a wasteful number, since it uses less digits than its factorization.

5678128921378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547232.

The product of its digits is 81285120, while the sum is 67.

The spelling of 5678128921378 in words is "five trillion, six hundred seventy-eight billion, one hundred twenty-eight million, nine hundred twenty-one thousand, three hundred seventy-eight".