7168839561 has 45 divisors (see below), whose sum is σ = 11285451281. Its totient is φ = 4385176848.

The previous prime is 7168839539. The next prime is 7168839569. The reversal of 7168839561 is 1659388617.

The square root of 7168839561 is 84669.

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

7168839561 is a `hidden beast` number, since 71 + 6 + 8 + 8 + 3 + 9 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3554425161 + 3614414400 = 59619^2 + 60120^2 .

It is not a de Polignac number, because 7168839561 - 2¹⁵ = 7168806793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7168839498 and 7168839507.

It is not an unprimeable number, because it can be changed into a prime (7168839569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 42927100 + ... + 42927266.

Almost surely, 2^7168839561 is an apocalyptic number.

7168839561 is the 84669-th square number.

7168839561 is the 42335-th centered octagonal number.

It is an amenable number.

7168839561 is a deficient number, since it is larger than the sum of its proper divisors (4116611720).

7168839561 is an frugal number, since it uses more digits than its factorization.

7168839561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 183 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The cubic root of 7168839561 is about 1928.1890859851.

The spelling of 7168839561 in words is "seven billion, one hundred sixty-eight million, eight hundred thirty-nine thousand, five hundred sixty-one".