32161393961 has 2 divisors, whose sum is σ = 32161393962. Its totient is φ = 32161393960.

The previous prime is 32161393937. The next prime is 32161393967. The reversal of 32161393961 is 16939316123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25460989225 + 6700404736 = 159565^2 + 81856^2 .

It is a cyclic number.

It is not a de Polignac number, because 32161393961 - 2⁶ = 32161393897 is a prime.

It is not a weakly prime, because it can be changed into another prime (32161393967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080696980 + 16080696981.

It is an arithmetic number, because the mean of its divisors is an integer number (16080696981).

Almost surely, 2^32161393961 is an apocalyptic number.

It is an amenable number.

32161393961 is a deficient number, since it is larger than the sum of its proper divisors (1).

32161393961 is an equidigital number, since it uses as much as digits as its factorization.

32161393961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The spelling of 32161393961 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred sixty-one".