7240255346509 has 2 divisors, whose sum is σ = 7240255346510. Its totient is φ = 7240255346508.

The previous prime is 7240255346503. The next prime is 7240255346563. The reversal of 7240255346509 is 9056435520427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7221463049284 + 18792297225 = 2687278^2 + 137085^2 .

It is a cyclic number.

It is not a de Polignac number, because 7240255346509 - 2⁹ = 7240255345997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7240255346503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620127673254 + 3620127673255.

It is an arithmetic number, because the mean of its divisors is an integer number (3620127673255).

Almost surely, 2^{7240255346509} is an apocalyptic number.

It is an amenable number.

7240255346509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7240255346509 is an equidigital number, since it uses as much as digits as its factorization.

7240255346509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 7240255346509 in words is "seven trillion, two hundred forty billion, two hundred fifty-five million, three hundred forty-six thousand, five hundred nine".