1681769663 has 8 divisors (see below), whose sum is σ = 1922281632. Its totient is φ = 1441322496.

The previous prime is 1681769657. The next prime is 1681769681. The reversal of 1681769663 is 3669671861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681769663 - 2⁶ = 1681769599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681769633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70031 + ... + 90927.

It is an arithmetic number, because the mean of its divisors is an integer number (240285204).

Almost surely, 2^1681769663 is an apocalyptic number.

1681769663 is a deficient number, since it is larger than the sum of its proper divisors (240511969).

1681769663 is a wasteful number, since it uses less digits than its factorization.

1681769663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32401.

The product of its digits is 1959552, while the sum is 53.

The square root of 1681769663 is about 41009.3850600079. The cubic root of 1681769663 is about 1189.2016543438.

The spelling of 1681769663 in words is "one billion, six hundred eighty-one million, seven hundred sixty-nine thousand, six hundred sixty-three".