840607557193 has 2 divisors, whose sum is σ = 840607557194. Its totient is φ = 840607557192.

The previous prime is 840607557187. The next prime is 840607557263. The reversal of 840607557193 is 391755706048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840544243344 + 63313849 = 916812^2 + 7957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840607557193 is a prime.

It is not a weakly prime, because it can be changed into another prime (840607567193) 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, 420303778596 + 420303778597.

It is an arithmetic number, because the mean of its divisors is an integer number (420303778597).

Almost surely, 2^840607557193 is an apocalyptic number.

It is an amenable number.

840607557193 is a deficient number, since it is larger than the sum of its proper divisors (1).

840607557193 is an equidigital number, since it uses as much as digits as its factorization.

840607557193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 840607557193 in words is "eight hundred forty billion, six hundred seven million, five hundred fifty-seven thousand, one hundred ninety-three".