28275545557291 has 16 divisors (see below), whose sum is σ = 29983504527360. Its totient is φ = 26572559877760.

The previous prime is 28275545557289. The next prime is 28275545557331. The reversal of 28275545557291 is 19275554557282.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28275545557291 - 2¹ = 28275545557289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28275545555291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125429820 + ... + 125655046.

It is an arithmetic number, because the mean of its divisors is an integer number (1873969032960).

Almost surely, 2^{28275545557291} is an apocalyptic number.

28275545557291 is a deficient number, since it is larger than the sum of its proper divisors (1707958970069).

28275545557291 is a wasteful number, since it uses less digits than its factorization.

28275545557291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236234.

The product of its digits is 352800000, while the sum is 67.

The spelling of 28275545557291 in words is "twenty-eight trillion, two hundred seventy-five billion, five hundred forty-five million, five hundred fifty-seven thousand, two hundred ninety-one".