3561494173 has 2 divisors, whose sum is σ = 3561494174. Its totient is φ = 3561494172.

The previous prime is 3561494161. The next prime is 3561494207. The reversal of 3561494173 is 3714941653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3377701924 + 183792249 = 58118^2 + 13557^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561494173 - 2⁵ = 3561494141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3561498173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780747086 + 1780747087.

It is an arithmetic number, because the mean of its divisors is an integer number (1780747087).

Almost surely, 2^3561494173 is an apocalyptic number.

It is an amenable number.

3561494173 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561494173 is an equidigital number, since it uses as much as digits as its factorization.

3561494173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 3561494173 is about 59678.2554453463. The cubic root of 3561494173 is about 1527.1349365767.

The spelling of 3561494173 in words is "three billion, five hundred sixty-one million, four hundred ninety-four thousand, one hundred seventy-three".