3155320661 has 2 divisors, whose sum is σ = 3155320662. Its totient is φ = 3155320660.

The previous prime is 3155320601. The next prime is 3155320673. The reversal of 3155320661 is 1660235513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2256820036 + 898500625 = 47506^2 + 29975^2 .

It is an emirp because it is prime and its reverse (1660235513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3155320661 - 2¹⁴ = 3155304277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3155320601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577660330 + 1577660331.

It is an arithmetic number, because the mean of its divisors is an integer number (1577660331).

Almost surely, 2^3155320661 is an apocalyptic number.

It is an amenable number.

3155320661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3155320661 is an equidigital number, since it uses as much as digits as its factorization.

3155320661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 3155320661 is about 56172.2410181399. The cubic root of 3155320661 is about 1466.7220929869.

The spelling of 3155320661 in words is "three billion, one hundred fifty-five million, three hundred twenty thousand, six hundred sixty-one".