78156628608 has 128 divisors (see below), whose sum is σ = 214565437440. Its totient is φ = 25180646400.

The previous prime is 78156628579. The next prime is 78156628609. The reversal of 78156628608 is 80682665187.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×78156628608² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78156628609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10840941 + ... + 10848147.

It is an arithmetic number, because the mean of its divisors is an integer number (1676292480).

Almost surely, 2^78156628608 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 78156628608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107282718720).

78156628608 is an abundant number, since it is smaller than the sum of its proper divisors (136408808832).

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

78156628608 is a wasteful number, since it uses less digits than its factorization.

78156628608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166 (or 8154 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 78156628608 in words is "seventy-eight billion, one hundred fifty-six million, six hundred twenty-eight thousand, six hundred eight".