28171122377 has 8 divisors (see below), whose sum is σ = 29144461440. Its totient is φ = 27197911440.

The previous prime is 28171122349. The next prime is 28171122437. The reversal of 28171122377 is 77322117182.

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 28171122377 - 2¹⁰ = 28171121353 is a prime.

It is a super-2 number, since 2×28171122377² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28171022377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696368 + ... + 735710.

It is an arithmetic number, because the mean of its divisors is an integer number (3643057680).

Almost surely, 2^28171122377 is an apocalyptic number.

It is an amenable number.

28171122377 is a deficient number, since it is larger than the sum of its proper divisors (973339063).

28171122377 is a wasteful number, since it uses less digits than its factorization.

28171122377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64063.

The product of its digits is 65856, while the sum is 41.

The spelling of 28171122377 in words is "twenty-eight billion, one hundred seventy-one million, one hundred twenty-two thousand, three hundred seventy-seven".