840316621851 has 12 divisors (see below), whose sum is σ = 1387189344112. Its totient is φ = 480180926736.

The previous prime is 840316621787. The next prime is 840316621889. The reversal of 840316621851 is 158126613048.

840316621851 is a `hidden beast` number, since 8 + 4 + 0 + 3 + 16 + 621 + 8 + 5 + 1 = 666.

It is not a de Polignac number, because 840316621851 - 2⁶ = 840316621787 is a prime.

It is a super-3 number, since 3×840316621851³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840316621797 and 840316621806.

It is not an unprimeable number, because it can be changed into a prime (840316621451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6669179476 + ... + 6669179601.

Almost surely, 2^840316621851 is an apocalyptic number.

840316621851 is a deficient number, since it is larger than the sum of its proper divisors (546872722261).

840316621851 is a wasteful number, since it uses less digits than its factorization.

840316621851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13338359090 (or 13338359087 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 840316621851 in words is "eight hundred forty billion, three hundred sixteen million, six hundred twenty-one thousand, eight hundred fifty-one".