840073876209 has 32 divisors (see below), whose sum is σ = 1284679059840. Its totient is φ = 542146602816.

The previous prime is 840073876199. The next prime is 840073876247. The reversal of 840073876209 is 902678370048.

840073876209 is a `hidden beast` number, since 8 + 4 + 0 + 0 + 7 + 3 + 8 + 7 + 620 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-840073876209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840073876259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1937499 + ... + 2331104.

It is an arithmetic number, because the mean of its divisors is an integer number (40146220620).

Almost surely, 2^840073876209 is an apocalyptic number.

It is an amenable number.

840073876209 is a deficient number, since it is larger than the sum of its proper divisors (444605183631).

840073876209 is a wasteful number, since it uses less digits than its factorization.

840073876209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268846 (or 4268840 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 840073876209 in words is "eight hundred forty billion, seventy-three million, eight hundred seventy-six thousand, two hundred nine".