1779444656 has 20 divisors (see below), whose sum is σ = 3761099304. Its totient is φ = 808838400.

The previous prime is 1779444637. The next prime is 1779444679. The reversal of 1779444656 is 6564449771.

It is a junction number, because it is equal to n+sod(n) for n = 1779444598 and 1779444607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055065 + ... + 5055416.

Almost surely, 2^1779444656 is an apocalyptic number.

1779444656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1779444656 is an abundant number, since it is smaller than the sum of its proper divisors (1981654648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1779444656 is a wasteful number, since it uses less digits than its factorization.

1779444656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110500 (or 10110494 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The square root of 1779444656 is about 42183.4642484469. The cubic root of 1779444656 is about 1211.7922251271.

The spelling of 1779444656 in words is "one billion, seven hundred seventy-nine million, four hundred forty-four thousand, six hundred fifty-six".