1771840008901 has 2 divisors, whose sum is σ = 1771840008902. Its totient is φ = 1771840008900.

The previous prime is 1771840008863. The next prime is 1771840008907. The reversal of 1771840008901 is 1098000481771.

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., 1322497700001 + 449342308900 = 1149999^2 + 670330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1771840008901 - 2²⁵ = 1771806454469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1771840008907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 885920004450 + 885920004451.

It is an arithmetic number, because the mean of its divisors is an integer number (885920004451).

Almost surely, 2^{1771840008901} is an apocalyptic number.

It is an amenable number.

1771840008901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1771840008901 is an equidigital number, since it uses as much as digits as its factorization.

1771840008901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 1771840008901 in words is "one trillion, seven hundred seventy-one billion, eight hundred forty million, eight thousand, nine hundred one".