1801680067640 has 16 divisors (see below), whose sum is σ = 4053780152280. Its totient is φ = 720672027040.

The previous prime is 1801680067619. The next prime is 1801680067643. The reversal of 1801680067640 is 467600861081.

It is a super-2 number, since 2×1801680067640² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801680067643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22521000806 + ... + 22521000885.

Almost surely, 2^{1801680067640} is an apocalyptic number.

1801680067640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801680067640 is an abundant number, since it is smaller than the sum of its proper divisors (2252100084640).

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

1801680067640 is a wasteful number, since it uses less digits than its factorization.

1801680067640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45042001702 (or 45042001698 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 1801680067640 in words is "one trillion, eight hundred one billion, six hundred eighty million, sixty-seven thousand, six hundred forty".