1681441485 has 16 divisors (see below), whose sum is σ = 2727161664. Its totient is φ = 884483712.

The previous prime is 1681441481. The next prime is 1681441507. The reversal of 1681441485 is 5841441861.

It is not a de Polignac number, because 1681441485 - 2² = 1681441481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681441481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766687 + ... + 768876.

It is an arithmetic number, because the mean of its divisors is an integer number (170447604).

Almost surely, 2^1681441485 is an apocalyptic number.

1681441485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1681441485 is a deficient number, since it is larger than the sum of its proper divisors (1045720179).

1681441485 is a wasteful number, since it uses less digits than its factorization.

1681441485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535644.

The product of its digits is 122880, while the sum is 42.

The square root of 1681441485 is about 41005.3836099603. The cubic root of 1681441485 is about 1189.1242963049.

The spelling of 1681441485 in words is "one billion, six hundred eighty-one million, four hundred forty-one thousand, four hundred eighty-five".