78447759767 has 16 divisors (see below), whose sum is σ = 85559231520. Its totient is φ = 71492585472.

The previous prime is 78447759757. The next prime is 78447759779. The reversal of 78447759767 is 76795774487.

It is a cyclic number.

It is not a de Polignac number, because 78447759767 - 2¹⁶ = 78447694231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78447759767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78447759707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728288 + ... + 829034.

It is an arithmetic number, because the mean of its divisors is an integer number (5347451970).

Almost surely, 2^78447759767 is an apocalyptic number.

78447759767 is a deficient number, since it is larger than the sum of its proper divisors (7111471753).

78447759767 is a wasteful number, since it uses less digits than its factorization.

78447759767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101522.

The product of its digits is 580849920, while the sum is 71.

The spelling of 78447759767 in words is "seventy-eight billion, four hundred forty-seven million, seven hundred fifty-nine thousand, seven hundred sixty-seven".