846649040840 has 16 divisors (see below), whose sum is σ = 1904960341980. Its totient is φ = 338659616320.

The previous prime is 846649040821. The next prime is 846649040863. The reversal of 846649040840 is 48040946648.

It can be written as a sum of positive squares in 2 ways, for example, as 820006313764 + 26642727076 = 905542^2 + 163226^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10583112971 + ... + 10583113050.

Almost surely, 2^846649040840 is an apocalyptic number.

It is an amenable number.

846649040840 is an abundant number, since it is smaller than the sum of its proper divisors (1058311301140).

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

846649040840 is a wasteful number, since it uses less digits than its factorization.

846649040840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21166226032 (or 21166226028 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 846649040840 in words is "eight hundred forty-six billion, six hundred forty-nine million, forty thousand, eight hundred forty".