78612528105 has 32 divisors (see below), whose sum is σ = 141841526400. Its totient is φ = 41300905536.

The previous prime is 78612528097. The next prime is 78612528143. The reversal of 78612528105 is 50182521687.

78612528105 is a `hidden beast` number, since 7 + 8 + 6 + 12 + 528 + 105 = 666.

It is not a de Polignac number, because 78612528105 - 2³ = 78612528097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4336590 + ... + 4354679.

It is an arithmetic number, because the mean of its divisors is an integer number (4432547700).

Almost surely, 2^78612528105 is an apocalyptic number.

It is an amenable number.

78612528105 is a deficient number, since it is larger than the sum of its proper divisors (63228998295).

78612528105 is a wasteful number, since it uses less digits than its factorization.

78612528105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8691350 (or 8691344 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 78612528105 in words is "seventy-eight billion, six hundred twelve million, five hundred twenty-eight thousand, one hundred five".