28321425165 has 24 divisors (see below), whose sum is σ = 49808261664. Its totient is φ = 13731599200.

The previous prime is 28321425127. The next prime is 28321425169. The reversal of 28321425165 is 56152412382.

It is not a de Polignac number, because 28321425165 - 2⁹ = 28321424653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321425169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7800231 + ... + 7803860.

It is an arithmetic number, because the mean of its divisors is an integer number (2075344236).

Almost surely, 2^28321425165 is an apocalyptic number.

It is an amenable number.

28321425165 is a deficient number, since it is larger than the sum of its proper divisors (21486836499).

28321425165 is a wasteful number, since it uses less digits than its factorization.

28321425165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15604121 (or 15604110 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The spelling of 28321425165 in words is "twenty-eight billion, three hundred twenty-one million, four hundred twenty-five thousand, one hundred sixty-five".