28545615097 has 2 divisors, whose sum is σ = 28545615098. Its totient is φ = 28545615096.

The previous prime is 28545615073. The next prime is 28545615113. The reversal of 28545615097 is 79051654582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23390949481 + 5154665616 = 152941^2 + 71796^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545615097 - 2²³ = 28537226489 is a prime.

It is not a weakly prime, because it can be changed into another prime (28545610097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272807548 + 14272807549.

It is an arithmetic number, because the mean of its divisors is an integer number (14272807549).

Almost surely, 2^28545615097 is an apocalyptic number.

It is an amenable number.

28545615097 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545615097 is an equidigital number, since it uses as much as digits as its factorization.

28545615097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 28545615097 in words is "twenty-eight billion, five hundred forty-five million, six hundred fifteen thousand, ninety-seven".