32161856761 has 2 divisors, whose sum is σ = 32161856762. Its totient is φ = 32161856760.

The previous prime is 32161856723. The next prime is 32161856791. The reversal of 32161856761 is 16765816123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23648288400 + 8513568361 = 153780^2 + 92269^2 .

It is a cyclic number.

It is not a de Polignac number, because 32161856761 - 2¹⁹ = 32161332473 is a prime.

It is a super-2 number, since 2×32161856761² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (32161856791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080928380 + 16080928381.

It is an arithmetic number, because the mean of its divisors is an integer number (16080928381).

Almost surely, 2^32161856761 is an apocalyptic number.

It is an amenable number.

32161856761 is a deficient number, since it is larger than the sum of its proper divisors (1).

32161856761 is an equidigital number, since it uses as much as digits as its factorization.

32161856761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The spelling of 32161856761 in words is "thirty-two billion, one hundred sixty-one million, eight hundred fifty-six thousand, seven hundred sixty-one".