78120222202205 has 32 divisors (see below), whose sum is σ = 99815416501248. Its totient is φ = 58490247168000.

The previous prime is 78120222202201. The next prime is 78120222202219. The reversal of 78120222202205 is 50220222202187.

It is a happy number.

It is not a de Polignac number, because 78120222202205 - 2² = 78120222202201 is a prime.

It is a super-2 number, since 2×78120222202205² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78120222202201) 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 in 31 ways as a sum of consecutive naturals, for example, 37555400 + ... + 39580910.

It is an arithmetic number, because the mean of its divisors is an integer number (3119231765664).

Almost surely, 2^{78120222202205} is an apocalyptic number.

It is an amenable number.

78120222202205 is a deficient number, since it is larger than the sum of its proper divisors (21695194299043).

78120222202205 is a wasteful number, since it uses less digits than its factorization.

78120222202205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028077.

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 78120222202205 in words is "seventy-eight trillion, one hundred twenty billion, two hundred twenty-two million, two hundred two thousand, two hundred five".