28161371375 has 8 divisors (see below), whose sum is σ = 35145391632. Its totient is φ = 22529097000.

The previous prime is 28161371339. The next prime is 28161371383. The reversal of 28161371375 is 57317316182.

It is not a de Polignac number, because 28161371375 - 2¹⁰ = 28161370351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112645361 + ... + 112645610.

It is an arithmetic number, because the mean of its divisors is an integer number (4393173954).

Almost surely, 2^28161371375 is an apocalyptic number.

28161371375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28161371375 is a deficient number, since it is larger than the sum of its proper divisors (6984020257).

28161371375 is an equidigital number, since it uses as much as digits as its factorization.

28161371375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225290986 (or 225290976 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The spelling of 28161371375 in words is "twenty-eight billion, one hundred sixty-one million, three hundred seventy-one thousand, three hundred seventy-five".