9778577644564 has 12 divisors (see below), whose sum is σ = 17153158175188. Its totient is φ = 4877675308800.

The previous prime is 9778577644553. The next prime is 9778577644597. The reversal of 9778577644564 is 4654467758779.

It can be written as a sum of positive squares in 2 ways, for example, as 19014203664 + 9759563440900 = 137892^2 + 3124030^2 .

It is a congruent number.

It is an unprimeable number.

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, 2903376477 + ... + 2903379844.

Almost surely, 2^{9778577644564} is an apocalyptic number.

It is an amenable number.

9778577644564 is a deficient number, since it is larger than the sum of its proper divisors (7374580530624).

9778577644564 is a wasteful number, since it uses less digits than its factorization.

9778577644564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5806756746 (or 5806756744 counting only the distinct ones).

The product of its digits is 9957427200, while the sum is 79.

The spelling of 9778577644564 in words is "nine trillion, seven hundred seventy-eight billion, five hundred seventy-seven million, six hundred forty-four thousand, five hundred sixty-four".