1680244912690 has 16 divisors (see below), whose sum is σ = 3024484307928. Its totient is φ = 672088306176.

The previous prime is 1680244912657. The next prime is 1680244912729. The reversal of 1680244912690 is 962194420861.

It can be written as a sum of positive squares in 4 ways, for example, as 1366825206769 + 313419705921 = 1169113^2 + 559839^2 .

It is a super-2 number, since 2×1680244912690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454377 + ... + 1888636.

Almost surely, 2^{1680244912690} is an apocalyptic number.

1680244912690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1680244912690 is a deficient number, since it is larger than the sum of its proper divisors (1344239395238).

1680244912690 is a wasteful number, since it uses less digits than its factorization.

1680244912690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414733.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 1680244912690 in words is "one trillion, six hundred eighty billion, two hundred forty-four million, nine hundred twelve thousand, six hundred ninety".