28081207850167 has 4 divisors (see below), whose sum is σ = 28081420894296. Its totient is φ = 28080994806040.

The previous prime is 28081207850153. The next prime is 28081207850173. The reversal of 28081207850167 is 76105870218082.

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 28081207850167 - 2⁷ = 28081207850039 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 (28081207850107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106324228 + ... + 106588009.

It is an arithmetic number, because the mean of its divisors is an integer number (7020355223574).

Almost surely, 2^{28081207850167} is an apocalyptic number.

28081207850167 is a deficient number, since it is larger than the sum of its proper divisors (213044129).

28081207850167 is a wasteful number, since it uses less digits than its factorization.

28081207850167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213044128.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 28081207850167 in words is "twenty-eight trillion, eighty-one billion, two hundred seven million, eight hundred fifty thousand, one hundred sixty-seven".