28521979153 has 2 divisors, whose sum is σ = 28521979154. Its totient is φ = 28521979152.

The previous prime is 28521979049. The next prime is 28521979217. The reversal of 28521979153 is 35197912582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25253341569 + 3268637584 = 158913^2 + 57172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28521979153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28521979153.

It is not a weakly prime, because it can be changed into another prime (28521979553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260989576 + 14260989577.

It is an arithmetic number, because the mean of its divisors is an integer number (14260989577).

Almost surely, 2^28521979153 is an apocalyptic number.

It is an amenable number.

28521979153 is a deficient number, since it is larger than the sum of its proper divisors (1).

28521979153 is an equidigital number, since it uses as much as digits as its factorization.

28521979153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 52.

The spelling of 28521979153 in words is "twenty-eight billion, five hundred twenty-one million, nine hundred seventy-nine thousand, one hundred fifty-three".