3649871330173 has 2 divisors, whose sum is σ = 3649871330174. Its totient is φ = 3649871330172.

The previous prime is 3649871330143. The next prime is 3649871330179. The reversal of 3649871330173 is 3710331789463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2589389468964 + 1060481861209 = 1609158^2 + 1029797^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649871330173 - 2¹³ = 3649871321981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3649871330179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824935665086 + 1824935665087.

It is an arithmetic number, because the mean of its divisors is an integer number (1824935665087).

Almost surely, 2^{3649871330173} is an apocalyptic number.

It is an amenable number.

3649871330173 is a deficient number, since it is larger than the sum of its proper divisors (1).

3649871330173 is an equidigital number, since it uses as much as digits as its factorization.

3649871330173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 55.

The spelling of 3649871330173 in words is "three trillion, six hundred forty-nine billion, eight hundred seventy-one million, three hundred thirty thousand, one hundred seventy-three".