9677779956 has 36 divisors (see below), whose sum is σ = 26345068932. Its totient is φ = 2977778304.

The previous prime is 9677779949. The next prime is 9677779963. The reversal of 9677779956 is 6599777769.

It is a happy number.

9677779956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9677779949) and next prime (9677779963).

It can be written as a sum of positive squares in 2 ways, for example, as 1013148900 + 8664631056 = 31830^2 + 93084^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 10339041 + ... + 10339976.

Almost surely, 2^9677779956 is an apocalyptic number.

It is an amenable number.

9677779956 is an abundant number, since it is smaller than the sum of its proper divisors (16667288976).

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

9677779956 is a wasteful number, since it uses less digits than its factorization.

9677779956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20679040 (or 20679035 counting only the distinct ones).

The product of its digits is 315059220, while the sum is 72.

The square root of 9677779956 is about 98375.7081600941. The cubic root of 9677779956 is about 2131.0415351912.

The spelling of 9677779956 in words is "nine billion, six hundred seventy-seven million, seven hundred seventy-nine thousand, nine hundred fifty-six".