78842252122 has 32 divisors (see below), whose sum is σ = 122945817600. Its totient is φ = 37891672368.

The previous prime is 78842252117. The next prime is 78842252141. The reversal of 78842252122 is 22125224887.

It is a happy number.

It is a super-2 number, since 2×78842252122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6221829 + ... + 6234487.

It is an arithmetic number, because the mean of its divisors is an integer number (3842056800).

Almost surely, 2^78842252122 is an apocalyptic number.

78842252122 is a deficient number, since it is larger than the sum of its proper divisors (44103565478).

78842252122 is a wasteful number, since it uses less digits than its factorization.

78842252122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13890.

The product of its digits is 286720, while the sum is 43.

The spelling of 78842252122 in words is "seventy-eight billion, eight hundred forty-two million, two hundred fifty-two thousand, one hundred twenty-two".