78543425536 has 117 divisors (see below), whose sum is σ = 163754988033. Its totient is φ = 37666406400.

The previous prime is 78543425509. The next prime is 78543425617. The reversal of 78543425536 is 63552434587.

The square root of 78543425536 is 280256.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41186267136 + 37357158400 = 202944^2 + 193280^2 .

It is a Duffinian number.

Its product of digits (12096000) is a multiple of the sum of its prime factors (384).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 520155061 + ... + 520155211.

Almost surely, 2^78543425536 is an apocalyptic number.

78543425536 is the 280256-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78543425536

78543425536 is an abundant number, since it is smaller than the sum of its proper divisors (85211562497).

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

78543425536 is an frugal number, since it uses more digits than its factorization.

78543425536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 182 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 52.

The spelling of 78543425536 in words is "seventy-eight billion, five hundred forty-three million, four hundred twenty-five thousand, five hundred thirty-six".