1806649812240 has 160 divisors (see below), whose sum is σ = 6893063982336. Its totient is φ = 381183252480.

The previous prime is 1806649812193. The next prime is 1806649812263. The reversal of 1806649812240 is 422189466081.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41339191 + ... + 41382870.

Almost surely, 2^{1806649812240} is an apocalyptic number.

1806649812240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806649812240 is an abundant number, since it is smaller than the sum of its proper divisors (5086414170096).

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

1806649812240 is a wasteful number, since it uses less digits than its factorization.

1806649812240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82722097 (or 82722091 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 1806649812240 in words is "one trillion, eight hundred six billion, six hundred forty-nine million, eight hundred twelve thousand, two hundred forty".