77763464076805 has 16 divisors (see below), whose sum is σ = 102141770727024. Its totient is φ = 56483928506880.

The previous prime is 77763464076791. The next prime is 77763464076841. The reversal of 77763464076805 is 50867046436777.

It can be written as a sum of positive squares in 8 ways, for example, as 21416477306436 + 56346986770369 = 4627794^2 + 7506463^2 .

It is not a de Polignac number, because 77763464076805 - 2²¹ = 77763461979653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9806233624 + ... + 9806241553.

It is an arithmetic number, because the mean of its divisors is an integer number (6383860670439).

Almost surely, 2^{77763464076805} is an apocalyptic number.

It is an amenable number.

77763464076805 is a deficient number, since it is larger than the sum of its proper divisors (24378306650219).

77763464076805 is a wasteful number, since it uses less digits than its factorization.

77763464076805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19612475256.

The product of its (nonzero) digits is 995742720, while the sum is 70.

The spelling of 77763464076805 in words is "seventy-seven trillion, seven hundred sixty-three billion, four hundred sixty-four million, seventy-six thousand, eight hundred five".