7240778261813 has 32 divisors (see below), whose sum is σ = 7744802688000. Its totient is φ = 6749737986816.

The previous prime is 7240778261807. The next prime is 7240778261837. The reversal of 7240778261813 is 3181628770427.

It is a cyclic number.

It is not a de Polignac number, because 7240778261813 - 2¹⁰ = 7240778260789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240778261803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1788286013 + ... + 1788290061.

It is an arithmetic number, because the mean of its divisors is an integer number (242025084000).

Almost surely, 2^{7240778261813} is an apocalyptic number.

It is an amenable number.

7240778261813 is a deficient number, since it is larger than the sum of its proper divisors (504024426187).

7240778261813 is a wasteful number, since it uses less digits than its factorization.

7240778261813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441.

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 7240778261813 in words is "seven trillion, two hundred forty billion, seven hundred seventy-eight million, two hundred sixty-one thousand, eight hundred thirteen".