1680618160 has 80 divisors (see below), whose sum is σ = 4221042336. Its totient is φ = 618614784.

The previous prime is 1680618157. The next prime is 1680618161. The reversal of 1680618160 is 618160861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1680618161) 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, 358552 + ... + 363208.

Almost surely, 2^1680618160 is an apocalyptic number.

1680618160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1680618160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2110521168).

1680618160 is an abundant number, since it is smaller than the sum of its proper divisors (2540424176).

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

1680618160 is a wasteful number, since it uses less digits than its factorization.

1680618160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030 (or 5024 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1680618160 is about 40995.3431501677. The cubic root of 1680618160 is about 1188.9301780221.

The spelling of 1680618160 in words is "one billion, six hundred eighty million, six hundred eighteen thousand, one hundred sixty".