28071663016 has 32 divisors (see below), whose sum is σ = 53243865000. Its totient is φ = 13873406976.

The previous prime is 28071662959. The next prime is 28071663019. The reversal of 28071663016 is 61036617082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28071662116 + 900 = 167546^2 + 30^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28071663016.

It is not an unprimeable number, because it can be changed into a prime (28071663019) 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, 3097660 + ... + 3106708.

Almost surely, 2^28071663016 is an apocalyptic number.

It is an amenable number.

28071663016 is a deficient number, since it is larger than the sum of its proper divisors (25172201984).

28071663016 is a wasteful number, since it uses less digits than its factorization.

28071663016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501 (or 13497 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

It can be divided in two parts, 2807166 and 3016, that added together give a palindrome (2810182).

The spelling of 28071663016 in words is "twenty-eight billion, seventy-one million, six hundred sixty-three thousand, sixteen".