1550032661 has 2 divisors, whose sum is σ = 1550032662. Its totient is φ = 1550032660.

The previous prime is 1550032609. The next prime is 1550032663. The reversal of 1550032661 is 1662300551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1075446436 + 474586225 = 32794^2 + 21785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550032661 - 2¹⁴ = 1550016277 is a prime.

Together with 1550032663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550032663) 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, 775016330 + 775016331.

It is an arithmetic number, because the mean of its divisors is an integer number (775016331).

Almost surely, 2^1550032661 is an apocalyptic number.

It is an amenable number.

1550032661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550032661 is an equidigital number, since it uses as much as digits as its factorization.

1550032661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1550032661 is about 39370.4541629888. The cubic root of 1550032661 is about 1157.3026558933.

The spelling of 1550032661 in words is "one billion, five hundred fifty million, thirty-two thousand, six hundred sixty-one".