776679205123 has 4 divisors (see below), whose sum is σ = 776684229160. Its totient is φ = 776674181088.

The previous prime is 776679205091. The next prime is 776679205163. The reversal of 776679205123 is 321502976677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321502976677 = 1873 ⋅171651349.

It is a cyclic number.

It is not a de Polignac number, because 776679205123 - 2⁵ = 776679205091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776679205163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2272518 + ... + 2591851.

It is an arithmetic number, because the mean of its divisors is an integer number (194171057290).

Almost surely, 2^776679205123 is an apocalyptic number.

776679205123 is a deficient number, since it is larger than the sum of its proper divisors (5024037).

776679205123 is a wasteful number, since it uses less digits than its factorization.

776679205123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024036.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 776679205123 in words is "seven hundred seventy-six billion, six hundred seventy-nine million, two hundred five thousand, one hundred twenty-three".