78744044787 has 16 divisors (see below), whose sum is σ = 108392893440. Its totient is φ = 50796050400.

The previous prime is 78744044777. The next prime is 78744044807.

78744044787 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78744044787 - 2⁸ = 78744044531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78744044787.

It is not an unprimeable number, because it can be changed into a prime (78744044777) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 729712 + ... + 830642.

It is an arithmetic number, because the mean of its divisors is an integer number (6774555840).

Almost surely, 2^78744044787 is an apocalyptic number.

78744044787 is a deficient number, since it is larger than the sum of its proper divisors (29648848653).

78744044787 is a wasteful number, since it uses less digits than its factorization.

78744044787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109354.

The product of its (nonzero) digits is 39337984, while the sum is 60.

The spelling of 78744044787 in words is "seventy-eight billion, seven hundred forty-four million, forty-four thousand, seven hundred eighty-seven".