28170566123 has 8 divisors (see below), whose sum is σ = 32232506592. Its totient is φ = 24118019136.

The previous prime is 28170566119. The next prime is 28170566131. The reversal of 28170566123 is 32166507182.

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 28170566123 - 2² = 28170566119 is a prime.

It is a super-2 number, since 2×28170566123² (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 (28170566143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2341940 + ... + 2353937.

It is an arithmetic number, because the mean of its divisors is an integer number (4029063324).

Almost surely, 2^28170566123 is an apocalyptic number.

28170566123 is a deficient number, since it is larger than the sum of its proper divisors (4061940469).

28170566123 is an equidigital number, since it uses as much as digits as its factorization.

28170566123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696741.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 28170566123 in words is "twenty-eight billion, one hundred seventy million, five hundred sixty-six thousand, one hundred twenty-three".