840607557187 has 2 divisors, whose sum is σ = 840607557188. Its totient is φ = 840607557186.

The previous prime is 840607557149. The next prime is 840607557193. The reversal of 840607557187 is 781755706048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840607557187 is a prime.

It is not a weakly prime, because it can be changed into another prime (840607557287) 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, 420303778593 + 420303778594.

It is an arithmetic number, because the mean of its divisors is an integer number (420303778594).

Almost surely, 2^840607557187 is an apocalyptic number.

840607557187 is a deficient number, since it is larger than the sum of its proper divisors (1).

840607557187 is an equidigital number, since it uses as much as digits as its factorization.

840607557187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13171200, while the sum is 58.

The spelling of 840607557187 in words is "eight hundred forty billion, six hundred seven million, five hundred fifty-seven thousand, one hundred eighty-seven".