3531169661 has 2 divisors, whose sum is σ = 3531169662. Its totient is φ = 3531169660.

The previous prime is 3531169531. The next prime is 3531169687. The reversal of 3531169661 is 1669611353.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1987465561 + 1543704100 = 44581^2 + 39290^2 .

It is a cyclic number.

It is not a de Polignac number, because 3531169661 - 2¹⁰ = 3531168637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3531169261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1765584830 + 1765584831.

It is an arithmetic number, because the mean of its divisors is an integer number (1765584831).

Almost surely, 2^3531169661 is an apocalyptic number.

It is an amenable number.

3531169661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3531169661 is an equidigital number, since it uses as much as digits as its factorization.

3531169661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The square root of 3531169661 is about 59423.6456387523. The cubic root of 3531169661 is about 1522.7882888034.

The spelling of 3531169661 in words is "three billion, five hundred thirty-one million, one hundred sixty-nine thousand, six hundred sixty-one".