28147927167779 has 8 divisors (see below), whose sum is σ = 28759777342800. Its totient is φ = 27541716165216.

The previous prime is 28147927167757. The next prime is 28147927167781. The reversal of 28147927167779 is 97776172974182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28147927167779 is a prime.

It is a super-2 number, since 2×28147927167779² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28147927167799) 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 7 ways as a sum of consecutive naturals, for example, 1409783024 + ... + 1409802989.

It is an arithmetic number, because the mean of its divisors is an integer number (3594972167850).

Almost surely, 2^{28147927167779} is an apocalyptic number.

28147927167779 is a deficient number, since it is larger than the sum of its proper divisors (611850175021).

28147927167779 is a wasteful number, since it uses less digits than its factorization.

28147927167779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819586229.

The product of its digits is 1045529856, while the sum is 77.

The spelling of 28147927167779 in words is "twenty-eight trillion, one hundred forty-seven billion, nine hundred twenty-seven million, one hundred sixty-seven thousand, seven hundred seventy-nine".