78742824787 has 6 divisors (see below), whose sum is σ = 86552030684. Its totient is φ = 71584386060.

The previous prime is 78742824763. The next prime is 78742824847.

78742824787 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-78742824787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78742824707) 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 5 ways as a sum of consecutive naturals, for example, 325383453 + ... + 325383694.

Almost surely, 2^78742824787 is an apocalyptic number.

78742824787 is a deficient number, since it is larger than the sum of its proper divisors (7809205897).

78742824787 is a wasteful number, since it uses less digits than its factorization.

78742824787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650767169 (or 650767158 counting only the distinct ones).

The product of its digits is 78675968, while the sum is 64.

The spelling of 78742824787 in words is "seventy-eight billion, seven hundred forty-two million, eight hundred twenty-four thousand, seven hundred eighty-seven".