77163644444 has 6 divisors (see below), whose sum is σ = 135036377784. Its totient is φ = 38581822220.

The previous prime is 77163644431. The next prime is 77163644473. The reversal of 77163644444 is 44444636177.

It is a junction number, because it is equal to n+sod(n) for n = 77163644392 and 77163644401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9645455552 + ... + 9645455559.

It is an arithmetic number, because the mean of its divisors is an integer number (22506062964).

Almost surely, 2^77163644444 is an apocalyptic number.

It is an amenable number.

77163644444 is a deficient number, since it is larger than the sum of its proper divisors (57872733340).

77163644444 is a wasteful number, since it uses less digits than its factorization.

77163644444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19290911115 (or 19290911113 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 50.

The spelling of 77163644444 in words is "seventy-seven billion, one hundred sixty-three million, six hundred forty-four thousand, four hundred forty-four".