78173169120 has 384 divisors, whose sum is σ = 288480890880. Its totient is φ = 19731824640.

The previous prime is 78173169089. The next prime is 78173169149. The reversal of 78173169120 is 2196137187.

It is a super-2 number, since 2×78173169120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9633865 + ... + 9641975.

It is an arithmetic number, because the mean of its divisors is an integer number (751252320).

Almost surely, 2^78173169120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78173169120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144240445440).

78173169120 is an abundant number, since it is smaller than the sum of its proper divisors (210307721760).

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

78173169120 is a wasteful number, since it uses less digits than its factorization.

78173169120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8255 (or 8241 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 78173169120 in words is "seventy-eight billion, one hundred seventy-three million, one hundred sixty-nine thousand, one hundred twenty".