28100134945 has 16 divisors (see below), whose sum is σ = 34706367360. Its totient is φ = 21827836800.

The previous prime is 28100134943. The next prime is 28100134967. The reversal of 28100134945 is 54943100182.

It is not a de Polignac number, because 28100134945 - 2¹ = 28100134943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28100134943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281565 + ... + 368074.

It is an arithmetic number, because the mean of its divisors is an integer number (2169147960).

Almost surely, 2^28100134945 is an apocalyptic number.

It is an amenable number.

28100134945 is a deficient number, since it is larger than the sum of its proper divisors (6606232415).

28100134945 is a wasteful number, since it uses less digits than its factorization.

28100134945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649896.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 28100134945 in words is "twenty-eight billion, one hundred million, one hundred thirty-four thousand, nine hundred forty-five".