7340640649 has 2 divisors, whose sum is σ = 7340640650. Its totient is φ = 7340640648.

The previous prime is 7340640623. The next prime is 7340640679. The reversal of 7340640649 is 9460460437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7089640000 + 251000649 = 84200^2 + 15843^2 .

It is an emirp because it is prime and its reverse (9460460437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7340640649 - 2¹⁵ = 7340607881 is a prime.

It is a super-2 number, since 2×7340640649² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7340640679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3670320324 + 3670320325.

It is an arithmetic number, because the mean of its divisors is an integer number (3670320325).

Almost surely, 2^7340640649 is an apocalyptic number.

It is an amenable number.

7340640649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7340640649 is an equidigital number, since it uses as much as digits as its factorization.

7340640649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 7340640649 is about 85677.5387660033. The cubic root of 7340640649 is about 1943.4706577556.

The spelling of 7340640649 in words is "seven billion, three hundred forty million, six hundred forty thousand, six hundred forty-nine".