28166546407247 has 8 divisors (see below), whose sum is σ = 29391285749760. Its totient is φ = 26941815972280.

The previous prime is 28166546407199. The next prime is 28166546407261. The reversal of 28166546407247 is 74270464566182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28166546407247 - 2²⁶ = 28166479298383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28166546407247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28166546407297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4692254 + ... + 8851572.

It is an arithmetic number, because the mean of its divisors is an integer number (3673910718720).

Almost surely, 2^{28166546407247} is an apocalyptic number.

28166546407247 is a deficient number, since it is larger than the sum of its proper divisors (1224739342513).

28166546407247 is a wasteful number, since it uses less digits than its factorization.

28166546407247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453773.

The product of its (nonzero) digits is 108380160, while the sum is 62.

The spelling of 28166546407247 in words is "twenty-eight trillion, one hundred sixty-six billion, five hundred forty-six million, four hundred seven thousand, two hundred forty-seven".