32161856791 has 2 divisors, whose sum is σ = 32161856792. Its totient is φ = 32161856790.

The previous prime is 32161856761. The next prime is 32161856819. The reversal of 32161856791 is 19765816123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 32161856791 - 2²⁵ = 32128302359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32161856761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080928395 + 16080928396.

It is an arithmetic number, because the mean of its divisors is an integer number (16080928396).

Almost surely, 2^32161856791 is an apocalyptic number.

32161856791 is a deficient number, since it is larger than the sum of its proper divisors (1).

32161856791 is an equidigital number, since it uses as much as digits as its factorization.

32161856791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The spelling of 32161856791 in words is "thirty-two billion, one hundred sixty-one million, eight hundred fifty-six thousand, seven hundred ninety-one".