73868170609 has 2 divisors, whose sum is σ = 73868170610. Its totient is φ = 73868170608.

The previous prime is 73868170573. The next prime is 73868170627. The reversal of 73868170609 is 90607186837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68276122209 + 5592048400 = 261297^2 + 74780^2 .

It is a cyclic number.

It is not a de Polignac number, because 73868170609 - 2²³ = 73859782001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73868170609.

It is not a weakly prime, because it can be changed into another prime (73868170669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36934085304 + 36934085305.

It is an arithmetic number, because the mean of its divisors is an integer number (36934085305).

Almost surely, 2^73868170609 is an apocalyptic number.

It is an amenable number.

73868170609 is a deficient number, since it is larger than the sum of its proper divisors (1).

73868170609 is an equidigital number, since it uses as much as digits as its factorization.

73868170609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 73868170609 in words is "seventy-three billion, eight hundred sixty-eight million, one hundred seventy thousand, six hundred nine".