840165365652 has 24 divisors (see below), whose sum is σ = 1961504205696. Its totient is φ = 279895357248.

The previous prime is 840165365647. The next prime is 840165365653. The reversal of 840165365652 is 256563561048.

It is a super-2 number, since 2×840165365652² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840165365595 and 840165365604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840165365653) 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 7 ways as a sum of consecutive naturals, for example, 19948668 + ... + 19990739.

It is an arithmetic number, because the mean of its divisors is an integer number (81729341904).

Almost surely, 2^840165365652 is an apocalyptic number.

It is an amenable number.

840165365652 is an abundant number, since it is smaller than the sum of its proper divisors (1121338840044).

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

840165365652 is a wasteful number, since it uses less digits than its factorization.

840165365652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39941167 (or 39941165 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 840165365652 in words is "eight hundred forty billion, one hundred sixty-five million, three hundred sixty-five thousand, six hundred fifty-two".