78530888128 has 112 divisors (see below), whose sum is σ = 194833036800. Its totient is φ = 30510535680.

The previous prime is 78530888101. The next prime is 78530888129. The reversal of 78530888128 is 82188803587.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-3 number, since 3×78530888128³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530888129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746958 + ... + 1791346.

Almost surely, 2^78530888128 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 78530888128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97416518400).

78530888128 is an abundant number, since it is smaller than the sum of its proper divisors (116302148672).

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

78530888128 is a wasteful number, since it uses less digits than its factorization.

78530888128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44778 (or 44768 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 58.

The spelling of 78530888128 in words is "seventy-eight billion, five hundred thirty million, eight hundred eighty-eight thousand, one hundred twenty-eight".