1638148182 has 64 divisors (see below), whose sum is σ = 3757238784. Its totient is φ = 471299840.

The previous prime is 1638148163. The next prime is 1638148223. The reversal of 1638148182 is 2818418361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204028 + ... + 211904.

It is an arithmetic number, because the mean of its divisors is an integer number (58706856).

Almost surely, 2^1638148182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1638148182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878619392).

1638148182 is an abundant number, since it is smaller than the sum of its proper divisors (2119090602).

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

1638148182 is a wasteful number, since it uses less digits than its factorization.

1638148182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053.

The product of its digits is 73728, while the sum is 42.

The square root of 1638148182 is about 40474.0433117325. The cubic root of 1638148182 is about 1178.8296789805.

The spelling of 1638148182 in words is "one billion, six hundred thirty-eight million, one hundred forty-eight thousand, one hundred eighty-two".