1965707161 has 8 divisors (see below), whose sum is σ = 2270549664. Its totient is φ = 1681888320.

The previous prime is 1965707153. The next prime is 1965707197. The reversal of 1965707161 is 1617075691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1965707161 - 2³ = 1965707153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965707131) 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 in 7 ways as a sum of consecutive naturals, for example, 5255715 + ... + 5256088.

It is an arithmetic number, because the mean of its divisors is an integer number (283818708).

Almost surely, 2^1965707161 is an apocalyptic number.

1965707161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1965707161 is a deficient number, since it is larger than the sum of its proper divisors (304842503).

1965707161 is a wasteful number, since it uses less digits than its factorization.

1965707161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511831.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 1965707161 is about 44336.2962029983. The cubic root of 1965707161 is about 1252.6784509677.

The spelling of 1965707161 in words is "one billion, nine hundred sixty-five million, seven hundred seven thousand, one hundred sixty-one".