1680081172 has 24 divisors (see below), whose sum is σ = 3665632320. Its totient is φ = 654576960.

The previous prime is 1680081133. The next prime is 1680081187. The reversal of 1680081172 is 2711800861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727097 + ... + 2727712.

It is an arithmetic number, because the mean of its divisors is an integer number (152734680).

Almost surely, 2^1680081172 is an apocalyptic number.

It is an amenable number.

1680081172 is an abundant number, since it is smaller than the sum of its proper divisors (1985551148).

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

1680081172 is a wasteful number, since it uses less digits than its factorization.

1680081172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454831 (or 5454829 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 1680081172 is about 40988.7932488869. The cubic root of 1680081172 is about 1188.8035362773.

The spelling of 1680081172 in words is "one billion, six hundred eighty million, eighty-one thousand, one hundred seventy-two".