161310320641 has 8 divisors (see below), whose sum is σ = 161665951040. Its totient is φ = 160955082288.

The previous prime is 161310320617. The next prime is 161310320653. The reversal of 161310320641 is 146023013161.

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 161310320641 - 2⁵ = 161310320609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161310320671) 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, 733555 + ... + 927751.

It is an arithmetic number, because the mean of its divisors is an integer number (20208243880).

Almost surely, 2^161310320641 is an apocalyptic number.

It is an amenable number.

161310320641 is a deficient number, since it is larger than the sum of its proper divisors (355630399).

161310320641 is an equidigital number, since it uses as much as digits as its factorization.

161310320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196023.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 161310320641 in words is "one hundred sixty-one billion, three hundred ten million, three hundred twenty thousand, six hundred forty-one".