2157680160 has 192 divisors, whose sum is σ = 7756560000. Its totient is φ = 559789056.

The previous prime is 2157680149. The next prime is 2157680167. The reversal of 2157680160 is 610867512.

2157680160 is a `hidden beast` number, since 2 + 1 + 576 + 80 + 1 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2157680167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153091 + ... + 166589.

It is an arithmetic number, because the mean of its divisors is an integer number (40398750).

Almost surely, 2^2157680160 is an apocalyptic number.

2157680160 is a gapful number since it is divisible by the number (20) 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 2157680160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3878280000).

2157680160 is an abundant number, since it is smaller than the sum of its proper divisors (5598879840).

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

2157680160 is a wasteful number, since it uses less digits than its factorization.

2157680160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560 (or 13546 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2157680160 is about 46450.8359451151. The cubic root of 2157680160 is about 1292.1978756762.

The spelling of 2157680160 in words is "two billion, one hundred fifty-seven million, six hundred eighty thousand, one hundred sixty".