1550661941 has 2 divisors, whose sum is σ = 1550661942. Its totient is φ = 1550661940.

The previous prime is 1550661811. The next prime is 1550661949. The reversal of 1550661941 is 1491660551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006792900 + 543869041 = 31730^2 + 23321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550661941 - 2¹⁴ = 1550645557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1550661895 and 1550661904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550661949) 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, 775330970 + 775330971.

It is an arithmetic number, because the mean of its divisors is an integer number (775330971).

Almost surely, 2^1550661941 is an apocalyptic number.

It is an amenable number.

1550661941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550661941 is an equidigital number, since it uses as much as digits as its factorization.

1550661941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1550661941 is about 39378.4451318231. The cubic root of 1550661941 is about 1157.4592480525.

The spelling of 1550661941 in words is "one billion, five hundred fifty million, six hundred sixty-one thousand, nine hundred forty-one".