1994616180 has 72 divisors (see below), whose sum is σ = 6060541032. Its totient is φ = 531000576.

The previous prime is 1994616161. The next prime is 1994616187. The reversal of 1994616180 is 816164991.

1994616180 is a `hidden beast` number, since 1 + 9 + 9 + 461 + 6 + 180 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 140280336 + 1854335844 = 11844^2 + 43062^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994616187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101302 + ... + 119378.

It is an arithmetic number, because the mean of its divisors is an integer number (84174181).

Almost surely, 2^1994616180 is an apocalyptic number.

1994616180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1994616180 is an abundant number, since it is smaller than the sum of its proper divisors (4065924852).

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

1994616180 is a wasteful number, since it uses less digits than its factorization.

1994616180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18705 (or 18700 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1994616180 is about 44661.1260493956. The cubic root of 1994616180 is about 1258.7895025877.

The spelling of 1994616180 in words is "one billion, nine hundred ninety-four million, six hundred sixteen thousand, one hundred eighty".