28167220721602 has 8 divisors (see below), whose sum is σ = 42250909050000. Its totient is φ = 14083584371604.

The previous prime is 28167220721593. The next prime is 28167220721659. The reversal of 28167220721602 is 20612702276182.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11610352 + ... + 13825147.

It is an arithmetic number, because the mean of its divisors is an integer number (5281363631250).

Almost surely, 2^{28167220721602} is an apocalyptic number.

28167220721602 is a deficient number, since it is larger than the sum of its proper divisors (14083688328398).

28167220721602 is a wasteful number, since it uses less digits than its factorization.

28167220721602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25989200.

The product of its (nonzero) digits is 451584, while the sum is 46.

Adding to 28167220721602 its reverse (20612702276182), we get a palindrome (48779922997784).

The spelling of 28167220721602 in words is "twenty-eight trillion, one hundred sixty-seven billion, two hundred twenty million, seven hundred twenty-one thousand, six hundred two".