840899811960 has 960 divisors, whose sum is σ = 3324914762400. Its totient is φ = 189235243008.

The previous prime is 840899811907. The next prime is 840899812087. The reversal of 840899811960 is 69118998048.

840899811960 is a `hidden beast` number, since 8 + 408 + 99 + 81 + 1 + 9 + 60 = 666.

It is a super-2 number, since 2×840899811960² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 239 ways as a sum of consecutive naturals, for example, 440953327 + ... + 440955233.

Almost surely, 2^840899811960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840899811960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662457381200).

840899811960 is an abundant number, since it is smaller than the sum of its proper divisors (2484014950440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840899811960 is a wasteful number, since it uses less digits than its factorization.

840899811960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 840899811960 in words is "eight hundred forty billion, eight hundred ninety-nine million, eight hundred eleven thousand, nine hundred sixty".