7776946969 has 9 divisors (see below), whose sum is σ = 8549280831. Its totient is φ = 7069069920.

The previous prime is 7776946963. The next prime is 7776946987. The reversal of 7776946969 is 9696496777.

The square root of 7776946969 is 88187.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4495032025 + 3281914944 = 67045^2 + 57288^2 .

It is not a de Polignac number, because 7776946969 - 2⁵ = 7776946937 is a prime.

It is a super-2 number, since 2×7776946969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7776946898 and 7776946907.

It is not an unprimeable number, because it can be changed into a prime (7776946963) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 966049 + ... + 974065.

Almost surely, 2^7776946969 is an apocalyptic number.

7776946969 is the 88187-th square number.

7776946969 is the 44094-th centered octagonal number.

It is an amenable number.

7776946969 is a deficient number, since it is larger than the sum of its proper divisors (772333862).

7776946969 is an frugal number, since it uses more digits than its factorization.

7776946969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056 (or 8028 counting only the distinct ones).

The product of its digits is 216040608, while the sum is 70.

The cubic root of 7776946969 is about 1981.2367684681.

The spelling of 7776946969 in words is "seven billion, seven hundred seventy-six million, nine hundred forty-six thousand, nine hundred sixty-nine".