1680155560 has 64 divisors (see below), whose sum is σ = 4213425600. Its totient is φ = 599233536.

The previous prime is 1680155557. The next prime is 1680155599. The reversal of 1680155560 is 655510861.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52102 + ... + 77941.

It is an arithmetic number, because the mean of its divisors is an integer number (65834775).

Almost surely, 2^1680155560 is an apocalyptic number.

1680155560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680155560 is an abundant number, since it is smaller than the sum of its proper divisors (2533270040).

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

1680155560 is a wasteful number, since it uses less digits than its factorization.

1680155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130090 (or 130086 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 1680155560 is about 40989.7006576042. The cubic root of 1680155560 is about 1188.8210813447.

It can be divided in two parts, 16801 and 55560, that added together give a square (72361 = 269²).

The spelling of 1680155560 in words is "one billion, six hundred eighty million, one hundred fifty-five thousand, five hundred sixty".