7840535639653 has 2 divisors, whose sum is σ = 7840535639654. Its totient is φ = 7840535639652.

The previous prime is 7840535639647. The next prime is 7840535639731. The reversal of 7840535639653 is 3569365350487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5508751667329 + 2331783972324 = 2347073^2 + 1527018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7840535639653 is a prime.

It is a super-2 number, since 2×7840535639653² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7840535636653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920267819826 + 3920267819827.

It is an arithmetic number, because the mean of its divisors is an integer number (3920267819827).

Almost surely, 2^{7840535639653} is an apocalyptic number.

It is an amenable number.

7840535639653 is a deficient number, since it is larger than the sum of its proper divisors (1).

7840535639653 is an equidigital number, since it uses as much as digits as its factorization.

7840535639653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944000, while the sum is 64.

The spelling of 7840535639653 in words is "seven trillion, eight hundred forty billion, five hundred thirty-five million, six hundred thirty-nine thousand, six hundred fifty-three".