78625533128 has 8 divisors (see below), whose sum is σ = 147422874630. Its totient is φ = 39312766560.

The previous prime is 78625533083. The next prime is 78625533139. The reversal of 78625533128 is 82133552687.

It can be written as a sum of positive squares in only one way, i.e., 66490748164 + 12134784964 = 257858^2 + 110158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4914095813 + ... + 4914095828.

Almost surely, 2^78625533128 is an apocalyptic number.

It is an amenable number.

78625533128 is a deficient number, since it is larger than the sum of its proper divisors (68797341502).

78625533128 is a wasteful number, since it uses less digits than its factorization.

78625533128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9828191647 (or 9828191643 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 50.

The spelling of 78625533128 in words is "seventy-eight billion, six hundred twenty-five million, five hundred thirty-three thousand, one hundred twenty-eight".