1640816082 has 64 divisors (see below), whose sum is σ = 3738389760. Its totient is φ = 533250432.

The previous prime is 1640816077. The next prime is 1640816087. The reversal of 1640816082 is 2806180461.

1640816082 is a `hidden beast` number, since 1 + 6 + 40 + 8 + 1 + 608 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1640816077) and next prime (1640816087).

It is not an unprimeable number, because it can be changed into a prime (1640816087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 476238 + ... + 479670.

It is an arithmetic number, because the mean of its divisors is an integer number (58412340).

Almost surely, 2^1640816082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640816082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869194880).

1640816082 is an abundant number, since it is smaller than the sum of its proper divisors (2097573678).

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

1640816082 is a wasteful number, since it uses less digits than its factorization.

1640816082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3658 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1640816082 is about 40506.9880637897. The cubic root of 1640816082 is about 1179.4692820712.

The spelling of 1640816082 in words is "one billion, six hundred forty million, eight hundred sixteen thousand, eighty-two".