840660846372 has 18 divisors (see below), whose sum is σ = 2125003806198. Its totient is φ = 280220282112.

The previous prime is 840660846367. The next prime is 840660846379. The reversal of 840660846372 is 273648066048.

It can be written as a sum of positive squares in only one way, i.e., 599782095936 + 240878750436 = 774456^2 + 490794^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (840660846379) 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 5 ways as a sum of consecutive naturals, for example, 11675845053 + ... + 11675845124.

It is an arithmetic number, because the mean of its divisors is an integer number (118055767011).

Almost surely, 2^840660846372 is an apocalyptic number.

It is an amenable number.

840660846372 is an abundant number, since it is smaller than the sum of its proper divisors (1284342959826).

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

840660846372 is a wasteful number, since it uses less digits than its factorization.

840660846372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23351690187 (or 23351690182 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 840660846372 in words is "eight hundred forty billion, six hundred sixty million, eight hundred forty-six thousand, three hundred seventy-two".