7361221649 has 2 divisors, whose sum is σ = 7361221650. Its totient is φ = 7361221648.

The previous prime is 7361221633. The next prime is 7361221657. The reversal of 7361221649 is 9461221637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5032483600 + 2328738049 = 70940^2 + 48257^2 .

It is a cyclic number.

It is not a de Polignac number, because 7361221649 - 2⁴ = 7361221633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7361221619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3680610824 + 3680610825.

It is an arithmetic number, because the mean of its divisors is an integer number (3680610825).

Almost surely, 2^7361221649 is an apocalyptic number.

It is an amenable number.

7361221649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7361221649 is an equidigital number, since it uses as much as digits as its factorization.

7361221649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 7361221649 is about 85797.5620224724. The cubic root of 7361221649 is about 1945.2852698683.

The spelling of 7361221649 in words is "seven billion, three hundred sixty-one million, two hundred twenty-one thousand, six hundred forty-nine".