56551378404138 has 64 divisors (see below), whose sum is σ = 113848625510400. Its totient is φ = 18726576261120.

The previous prime is 56551378404119. The next prime is 56551378404221. The reversal of 56551378404138 is 83140487315565.

56551378404138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3076947033 + ... + 3076965411.

It is an arithmetic number, because the mean of its divisors is an integer number (1778884773600).

Almost surely, 2^{56551378404138} is an apocalyptic number.

56551378404138 is an abundant number, since it is smaller than the sum of its proper divisors (57297247106262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56551378404138 is a wasteful number, since it uses less digits than its factorization.

56551378404138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24027.

The product of its (nonzero) digits is 48384000, while the sum is 60.

The spelling of 56551378404138 in words is "fifty-six trillion, five hundred fifty-one billion, three hundred seventy-eight million, four hundred four thousand, one hundred thirty-eight".