1681154616 has 96 divisors (see below), whose sum is σ = 4495069440. Its totient is φ = 523832832.

The previous prime is 1681154603. The next prime is 1681154639. The reversal of 1681154616 is 6164511861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1129825 + ... + 1131311.

It is an arithmetic number, because the mean of its divisors is an integer number (46823640).

Almost surely, 2^1681154616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681154616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247534720).

1681154616 is an abundant number, since it is smaller than the sum of its proper divisors (2813914824).

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

1681154616 is a wasteful number, since it uses less digits than its factorization.

1681154616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1672 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 1681154616 is about 41001.8855176198. The cubic root of 1681154616 is about 1189.0566673682.

The spelling of 1681154616 in words is "one billion, six hundred eighty-one million, one hundred fifty-four thousand, six hundred sixteen".