77761360460785 has 16 divisors (see below), whose sum is σ = 94517982795600. Its totient is φ = 61409485541376.

The previous prime is 77761360460761. The next prime is 77761360460803. The reversal of 77761360460785 is 58706406316777.

It can be written as a sum of positive squares in 8 ways, for example, as 17652366966784 + 60108993494001 = 4201472^2 + 7752999^2 .

It is not a de Polignac number, because 77761360460785 - 2⁵ = 77761360460753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77761360460785.

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, 205894500 + ... + 206271829.

It is an arithmetic number, because the mean of its divisors is an integer number (5907373924725).

Almost surely, 2^{77761360460785} is an apocalyptic number.

It is an amenable number.

77761360460785 is a deficient number, since it is larger than the sum of its proper divisors (16756622334815).

77761360460785 is a wasteful number, since it uses less digits than its factorization.

77761360460785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412166820.

The product of its (nonzero) digits is 248935680, while the sum is 67.

The spelling of 77761360460785 in words is "seventy-seven trillion, seven hundred sixty-one billion, three hundred sixty million, four hundred sixty thousand, seven hundred eighty-five".