78897080089 has 2 divisors, whose sum is σ = 78897080090. Its totient is φ = 78897080088.

The previous prime is 78897080063. The next prime is 78897080117. The reversal of 78897080089 is 98008079887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67240638864 + 11656441225 = 259308^2 + 107965^2 .

It is a cyclic number.

It is not a de Polignac number, because 78897080089 - 2¹¹ = 78897078041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78897080089.

It is not a weakly prime, because it can be changed into another prime (78897080029) 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, 39448540044 + 39448540045.

It is an arithmetic number, because the mean of its divisors is an integer number (39448540045).

Almost surely, 2^78897080089 is an apocalyptic number.

It is an amenable number.

78897080089 is a deficient number, since it is larger than the sum of its proper divisors (1).

78897080089 is an equidigital number, since it uses as much as digits as its factorization.

78897080089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 64.

The spelling of 78897080089 in words is "seventy-eight billion, eight hundred ninety-seven million, eighty thousand, eighty-nine".