840618364851 has 16 divisors (see below), whose sum is σ = 1246684021920. Its totient is φ = 559816676640.

The previous prime is 840618364849. The next prime is 840618364871. The reversal of 840618364851 is 158463816048.

840618364851 is a `hidden beast` number, since 8 + 406 + 183 + 6 + 4 + 8 + 51 = 666.

It is not a de Polignac number, because 840618364851 - 2¹ = 840618364849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840618364871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16517640 + ... + 16568453.

It is an arithmetic number, because the mean of its divisors is an integer number (77917751370).

Almost surely, 2^840618364851 is an apocalyptic number.

840618364851 is a deficient number, since it is larger than the sum of its proper divisors (406065657069).

840618364851 is a wasteful number, since it uses less digits than its factorization.

840618364851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33087043 (or 33087037 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 840618364851 in words is "eight hundred forty billion, six hundred eighteen million, three hundred sixty-four thousand, eight hundred fifty-one".