28108563751055 has 16 divisors (see below), whose sum is σ = 33787294041600. Its totient is φ = 22448840882208.

The previous prime is 28108563751007. The next prime is 28108563751057. The reversal of 28108563751055 is 55015736580182.

It is a cyclic number.

It is not a de Polignac number, because 28108563751055 - 2³⁴ = 28091383881871 is a prime.

It is a super-2 number, since 2×28108563751055² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108563751057) 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, 246979694 + ... + 247093476.

It is an arithmetic number, because the mean of its divisors is an integer number (2111705877600).

Almost surely, 2^{28108563751055} is an apocalyptic number.

28108563751055 is a deficient number, since it is larger than the sum of its proper divisors (5678730290545).

28108563751055 is a wasteful number, since it uses less digits than its factorization.

28108563751055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196870.

The product of its (nonzero) digits is 10080000, while the sum is 56.

The spelling of 28108563751055 in words is "twenty-eight trillion, one hundred eight billion, five hundred sixty-three million, seven hundred fifty-one thousand, fifty-five".