78644056120 has 128 divisors (see below), whose sum is σ = 205256073600. Its totient is φ = 26562134016.

The previous prime is 78644056103. The next prime is 78644056123. The reversal of 78644056120 is 2165044687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78644056123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6897144 + ... + 6908536.

It is an arithmetic number, because the mean of its divisors is an integer number (1603563075).

Almost surely, 2^78644056120 is an apocalyptic number.

78644056120 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78644056120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102628036800).

78644056120 is an abundant number, since it is smaller than the sum of its proper divisors (126612017480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78644056120 is a wasteful number, since it uses less digits than its factorization.

78644056120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11777 (or 11773 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 78644056120 in words is "seventy-eight billion, six hundred forty-four million, fifty-six thousand, one hundred twenty".