1640771084 has 6 divisors (see below), whose sum is σ = 2871349404. Its totient is φ = 820385540.

The previous prime is 1640771071. The next prime is 1640771113. The reversal of 1640771084 is 4801770461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205096382 + ... + 205096389.

It is an arithmetic number, because the mean of its divisors is an integer number (478558234).

Almost surely, 2^1640771084 is an apocalyptic number.

It is an amenable number.

1640771084 is a deficient number, since it is larger than the sum of its proper divisors (1230578320).

1640771084 is a wasteful number, since it uses less digits than its factorization.

1640771084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410192775 (or 410192773 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 1640771084 is about 40506.4326249548. The cubic root of 1640771084 is about 1179.4584999885.

The spelling of 1640771084 in words is "one billion, six hundred forty million, seven hundred seventy-one thousand, eighty-four".