3161244432065 has 4 divisors (see below), whose sum is σ = 3793493318484. Its totient is φ = 2528995545648.

The previous prime is 3161244432041. The next prime is 3161244432107. The reversal of 3161244432065 is 5602344421613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1335524611201 + 1825719820864 = 1155649^2 + 1351192^2 .

It is a cyclic number.

It is not a de Polignac number, because 3161244432065 - 2¹² = 3161244427969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 316124443202 + ... + 316124443211.

It is an arithmetic number, because the mean of its divisors is an integer number (948373329621).

Almost surely, 2^{3161244432065} is an apocalyptic number.

It is an amenable number.

3161244432065 is a deficient number, since it is larger than the sum of its proper divisors (632248886419).

3161244432065 is an equidigital number, since it uses as much as digits as its factorization.

3161244432065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632248886418.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 3161244432065 its reverse (5602344421613), we get a palindrome (8763588853678).

The spelling of 3161244432065 in words is "three trillion, one hundred sixty-one billion, two hundred forty-four million, four hundred thirty-two thousand, sixty-five".