7280640679309 has 2 divisors, whose sum is σ = 7280640679310. Its totient is φ = 7280640679308.

The previous prime is 7280640679271. The next prime is 7280640679313. The reversal of 7280640679309 is 9039760460827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6800672996100 + 479967683209 = 2607810^2 + 692797^2 .

It is a cyclic number.

It is not a de Polignac number, because 7280640679309 - 2³¹ = 7278493195661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7280640679339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640320339654 + 3640320339655.

It is an arithmetic number, because the mean of its divisors is an integer number (3640320339655).

Almost surely, 2^{7280640679309} is an apocalyptic number.

It is an amenable number.

7280640679309 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280640679309 is an equidigital number, since it uses as much as digits as its factorization.

7280640679309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 7280640679309 in words is "seven trillion, two hundred eighty billion, six hundred forty million, six hundred seventy-nine thousand, three hundred nine".