78543782128 has 40 divisors (see below), whose sum is σ = 174320141408. Its totient is φ = 33583859712.

The previous prime is 78543782117. The next prime is 78543782129. The reversal of 78543782128 is 82128734587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78543782129) 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 7 ways as a sum of consecutive naturals, for example, 761301 + ... + 858292.

Almost surely, 2^78543782128 is an apocalyptic number.

It is an amenable number.

78543782128 is an abundant number, since it is smaller than the sum of its proper divisors (95776359280).

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

78543782128 is a wasteful number, since it uses less digits than its factorization.

78543782128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620041 (or 1620035 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 55.

The spelling of 78543782128 in words is "seventy-eight billion, five hundred forty-three million, seven hundred eighty-two thousand, one hundred twenty-eight".