77707863247 has 8 divisors (see below), whose sum is σ = 90484628256. Its totient is φ = 65350008672.

The previous prime is 77707863179. The next prime is 77707863257. The reversal of 77707863247 is 74236870777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77707863247 - 2¹¹ = 77707861199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77707863191 and 77707863200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77707863257) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 104727208 + ... + 104727949.

It is an arithmetic number, because the mean of its divisors is an integer number (11310578532).

Almost surely, 2^77707863247 is an apocalyptic number.

77707863247 is a deficient number, since it is larger than the sum of its proper divisors (12776765009).

77707863247 is a wasteful number, since it uses less digits than its factorization.

77707863247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209455217.

The product of its (nonzero) digits is 19361664, while the sum is 58.

The spelling of 77707863247 in words is "seventy-seven billion, seven hundred seven million, eight hundred sixty-three thousand, two hundred forty-seven".