171080939761 has 2 divisors, whose sum is σ = 171080939762. Its totient is φ = 171080939760.

The previous prime is 171080939723. The next prime is 171080939807. The reversal of 171080939761 is 167939080171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125954010000 + 45126929761 = 354900^2 + 212431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171080939761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171080939699 and 171080939708.

It is not a weakly prime, because it can be changed into another prime (171080931761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85540469880 + 85540469881.

It is an arithmetic number, because the mean of its divisors is an integer number (85540469881).

Almost surely, 2^171080939761 is an apocalyptic number.

It is an amenable number.

171080939761 is a deficient number, since it is larger than the sum of its proper divisors (1).

171080939761 is an equidigital number, since it uses as much as digits as its factorization.

171080939761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 52.

The spelling of 171080939761 in words is "one hundred seventy-one billion, eighty million, nine hundred thirty-nine thousand, seven hundred sixty-one".