965865561 has 8 divisors (see below), whose sum is σ = 1332228480. Its totient is φ = 621706512.

The previous prime is 965865553. The next prime is 965865583. The reversal of 965865561 is 165568569.

It is a happy number.

965865561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 965865561 - 2³ = 965865553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (965865661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5550865 + ... + 5551038.

It is an arithmetic number, because the mean of its divisors is an integer number (166528560).

Almost surely, 2^965865561 is an apocalyptic number.

It is an amenable number.

965865561 is a deficient number, since it is larger than the sum of its proper divisors (366362919).

965865561 is a wasteful number, since it uses less digits than its factorization.

965865561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101935.

The product of its digits is 1944000, while the sum is 51.

The square root of 965865561 is about 31078.3777086257. The cubic root of 965865561 is about 988.4898790811.

The spelling of 965865561 in words is "nine hundred sixty-five million, eight hundred sixty-five thousand, five hundred sixty-one".