78102355099 has 2 divisors, whose sum is σ = 78102355100. Its totient is φ = 78102355098.

The previous prime is 78102355069. The next prime is 78102355117. The reversal of 78102355099 is 99055320187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78102355099 - 2¹¹ = 78102353051 is a prime.

It is not a weakly prime, because it can be changed into another prime (78102355069) 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, 39051177549 + 39051177550.

It is an arithmetic number, because the mean of its divisors is an integer number (39051177550).

Almost surely, 2^78102355099 is an apocalyptic number.

78102355099 is a deficient number, since it is larger than the sum of its proper divisors (1).

78102355099 is an equidigital number, since it uses as much as digits as its factorization.

78102355099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 78102355099 in words is "seventy-eight billion, one hundred two million, three hundred fifty-five thousand, ninety-nine".