1683641216440 has 16 divisors (see below), whose sum is σ = 3788192737080. Its totient is φ = 673456486560.

The previous prime is 1683641216431. The next prime is 1683641216449. The reversal of 1683641216440 is 446121463861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1683641216431) and next prime (1683641216449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683641216449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21045515166 + ... + 21045515245.

Almost surely, 2^{1683641216440} is an apocalyptic number.

1683641216440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1683641216440 is an abundant number, since it is smaller than the sum of its proper divisors (2104551520640).

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

1683641216440 is a wasteful number, since it uses less digits than its factorization.

1683641216440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42091030422 (or 42091030418 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 1683641216440 in words is "one trillion, six hundred eighty-three billion, six hundred forty-one million, two hundred sixteen thousand, four hundred forty".