28078575155 has 16 divisors (see below), whose sum is σ = 35593927200. Its totient is φ = 21204852480.

The previous prime is 28078575143. The next prime is 28078575167. The reversal of 28078575155 is 55157587082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28078575143) and next prime (28078575167).

It is not a de Polignac number, because 28078575155 - 2⁸ = 28078574899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28078575097 and 28078575106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499220 + ... + 552609.

It is an arithmetic number, because the mean of its divisors is an integer number (2224620450).

Almost surely, 2^28078575155 is an apocalyptic number.

28078575155 is a deficient number, since it is larger than the sum of its proper divisors (7515352045).

28078575155 is a wasteful number, since it uses less digits than its factorization.

28078575155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052134.

The product of its (nonzero) digits is 3920000, while the sum is 53.

The spelling of 28078575155 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-five thousand, one hundred fifty-five".