9625179661 has 2 divisors, whose sum is σ = 9625179662. Its totient is φ = 9625179660.

The previous prime is 9625179659. The next prime is 9625179673. The reversal of 9625179661 is 1669715269.

9625179661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6677341225 + 2947838436 = 81715^2 + 54294^2 .

It is a cyclic number.

It is not a de Polignac number, because 9625179661 - 2¹ = 9625179659 is a prime.

Together with 9625179659, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9625179599 and 9625179608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9625179601) by changing a digit.

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 as a sum of consecutive naturals, namely, 4812589830 + 4812589831.

It is an arithmetic number, because the mean of its divisors is an integer number (4812589831).

Almost surely, 2^9625179661 is an apocalyptic number.

It is an amenable number.

9625179661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9625179661 is an equidigital number, since it uses as much as digits as its factorization.

9625179661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 9625179661 is about 98107.9999847107. Note that the first 4 decimals coincide. The cubic root of 9625179661 is about 2127.1736677226.

The spelling of 9625179661 in words is "nine billion, six hundred twenty-five million, one hundred seventy-nine thousand, six hundred sixty-one".