77712663765 has 32 divisors (see below), whose sum is σ = 135672662016. Its totient is φ = 37670884160.

The previous prime is 77712663719. The next prime is 77712663779. The reversal of 77712663765 is 56736621777.

It is not a de Polignac number, because 77712663765 - 2¹² = 77712659669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 772144 + ... + 866966.

It is an arithmetic number, because the mean of its divisors is an integer number (4239770688).

Almost surely, 2^77712663765 is an apocalyptic number.

It is an amenable number.

77712663765 is a deficient number, since it is larger than the sum of its proper divisors (57959998251).

77712663765 is a wasteful number, since it uses less digits than its factorization.

77712663765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99809.

The product of its digits is 15558480, while the sum is 57.

The spelling of 77712663765 in words is "seventy-seven billion, seven hundred twelve million, six hundred sixty-three thousand, seven hundred sixty-five".