840009090771 has 24 divisors (see below), whose sum is σ = 1217390148000. Its totient is φ = 558140169600.

The previous prime is 840009090757. The next prime is 840009090779. The reversal of 840009090771 is 177090900048.

840009090771 is a `hidden beast` number, since 8 + 400 + 0 + 90 + 90 + 7 + 71 = 666.

It is not a de Polignac number, because 840009090771 - 2¹³ = 840009082579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840009090779) 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 in 23 ways as a sum of consecutive naturals, for example, 41473855 + ... + 41494103.

It is an arithmetic number, because the mean of its divisors is an integer number (50724589500).

Almost surely, 2^840009090771 is an apocalyptic number.

840009090771 is a deficient number, since it is larger than the sum of its proper divisors (377381057229).

840009090771 is a wasteful number, since it uses less digits than its factorization.

840009090771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35387 (or 35384 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 840009090771 in words is "eight hundred forty billion, nine million, ninety thousand, seven hundred seventy-one".