7351661549 has 2 divisors, whose sum is σ = 7351661550. Its totient is φ = 7351661548.

The previous prime is 7351661521. The next prime is 7351661561. The reversal of 7351661549 is 9451661537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7143292324 + 208369225 = 84518^2 + 14435^2 .

It is an emirp because it is prime and its reverse (9451661537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7351661549 - 2¹⁶ = 7351596013 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 (7351661599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3675830774 + 3675830775.

It is an arithmetic number, because the mean of its divisors is an integer number (3675830775).

Almost surely, 2^7351661549 is an apocalyptic number.

It is an amenable number.

7351661549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7351661549 is an equidigital number, since it uses as much as digits as its factorization.

7351661549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 7351661549 is about 85741.8308003742. The cubic root of 7351661549 is about 1944.4427838802.

The spelling of 7351661549 in words is "seven billion, three hundred fifty-one million, six hundred sixty-one thousand, five hundred forty-nine".