28550554377 has 16 divisors (see below), whose sum is σ = 38463906240. Its totient is φ = 18835830272.

The previous prime is 28550554343. The next prime is 28550554379. The reversal of 28550554377 is 77345505582.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28550554377 - 2⁸ = 28550554121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28550554379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259249 + ... + 352577.

It is an arithmetic number, because the mean of its divisors is an integer number (2403994140).

Almost surely, 2^28550554377 is an apocalyptic number.

It is an amenable number.

28550554377 is a deficient number, since it is larger than the sum of its proper divisors (9913351863).

28550554377 is a wasteful number, since it uses less digits than its factorization.

28550554377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94392.

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 28550554377 in words is "twenty-eight billion, five hundred fifty million, five hundred fifty-four thousand, three hundred seventy-seven".