28175177668 has 24 divisors (see below), whose sum is σ = 54233522784. Its totient is φ = 12806896520.

The previous prime is 28175177617. The next prime is 28175177671. The reversal of 28175177668 is 86677157182.

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, 2640730 + ... + 2651377.

It is an arithmetic number, because the mean of its divisors is an integer number (2259730116).

Almost surely, 2^28175177668 is an apocalyptic number.

It is an amenable number.

28175177668 is a deficient number, since it is larger than the sum of its proper divisors (26058345116).

28175177668 is a wasteful number, since it uses less digits than its factorization.

28175177668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292144 (or 5292120 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 58.

The spelling of 28175177668 in words is "twenty-eight billion, one hundred seventy-five million, one hundred seventy-seven thousand, six hundred sixty-eight".