28049109167 has 4 divisors (see below), whose sum is σ = 28211242920. Its totient is φ = 27886975416.

The previous prime is 28049109139. The next prime is 28049109173. The reversal of 28049109167 is 76190194082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28049109167 - 2¹⁸ = 28048847023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28049109107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81066617 + ... + 81066962.

It is an arithmetic number, because the mean of its divisors is an integer number (7052810730).

Almost surely, 2^28049109167 is an apocalyptic number.

28049109167 is a deficient number, since it is larger than the sum of its proper divisors (162133753).

28049109167 is a wasteful number, since it uses less digits than its factorization.

28049109167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162133752.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 28049109167 in words is "twenty-eight billion, forty-nine million, one hundred nine thousand, one hundred sixty-seven".