1681383045 has 32 divisors (see below), whose sum is σ = 2925462528. Its totient is φ = 821173248.

The previous prime is 1681383043. The next prime is 1681383061. The reversal of 1681383045 is 5403831861.

It is not a de Polignac number, because 1681383045 - 2¹ = 1681383043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1681382994 and 1681383012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681383043) 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 31 ways as a sum of consecutive naturals, for example, 79669 + ... + 98538.

It is an arithmetic number, because the mean of its divisors is an integer number (91420704).

Almost surely, 2^1681383045 is an apocalyptic number.

1681383045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1681383045 is a deficient number, since it is larger than the sum of its proper divisors (1244079483).

1681383045 is a wasteful number, since it uses less digits than its factorization.

1681383045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178269.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1681383045 is about 41004.6710144101. The cubic root of 1681383045 is about 1189.1105197865.

The spelling of 1681383045 in words is "one billion, six hundred eighty-one million, three hundred eighty-three thousand, forty-five".