78020105099 has 16 divisors (see below), whose sum is σ = 88148616480. Its totient is φ = 68612935680.

The previous prime is 78020105089. The next prime is 78020105101. The reversal of 78020105099 is 99050102087.

It is not a de Polignac number, because 78020105099 - 2⁴ = 78020105083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78020105029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1630862 + ... + 1678019.

It is an arithmetic number, because the mean of its divisors is an integer number (5509288530).

Almost surely, 2^78020105099 is an apocalyptic number.

78020105099 is a deficient number, since it is larger than the sum of its proper divisors (10128511381).

78020105099 is a wasteful number, since it uses less digits than its factorization.

78020105099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308990.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 78020105099 in words is "seventy-eight billion, twenty million, one hundred five thousand, ninety-nine".