32161643421961 has 4 divisors (see below), whose sum is σ = 32251230172800. Its totient is φ = 32072056671124.

The previous prime is 32161643421913. The next prime is 32161643421983. The reversal of 32161643421961 is 16912434616123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32161643421961 - 2⁷ = 32161643421833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32161643421911) by changing a digit.

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, 44793374881 + ... + 44793375598.

It is an arithmetic number, because the mean of its divisors is an integer number (8062807543200).

Almost surely, 2^{32161643421961} is an apocalyptic number.

It is an amenable number.

32161643421961 is a deficient number, since it is larger than the sum of its proper divisors (89586750839).

32161643421961 is an equidigital number, since it uses as much as digits as its factorization.

32161643421961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89586750838.

The product of its digits is 1119744, while the sum is 49.

The spelling of 32161643421961 in words is "thirty-two trillion, one hundred sixty-one billion, six hundred forty-three million, four hundred twenty-one thousand, nine hundred sixty-one".