1550361749 has 2 divisors, whose sum is σ = 1550361750. Its totient is φ = 1550361748.

The previous prime is 1550361643. The next prime is 1550361803. The reversal of 1550361749 is 9471630551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1398012100 + 152349649 = 37390^2 + 12343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550361749 - 2⁸ = 1550361493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550366749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775180874 + 775180875.

It is an arithmetic number, because the mean of its divisors is an integer number (775180875).

Almost surely, 2^1550361749 is an apocalyptic number.

It is an amenable number.

1550361749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550361749 is an equidigital number, since it uses as much as digits as its factorization.

1550361749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1550361749 is about 39374.6333189276. The cubic root of 1550361749 is about 1157.3845525475.

The spelling of 1550361749 in words is "one billion, five hundred fifty million, three hundred sixty-one thousand, seven hundred forty-nine".