1640612044 has 6 divisors (see below), whose sum is σ = 2871071084. Its totient is φ = 820306020.

The previous prime is 1640612021. The next prime is 1640612059. The reversal of 1640612044 is 4402160461.

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, 205076502 + ... + 205076509.

Almost surely, 2^1640612044 is an apocalyptic number.

It is an amenable number.

1640612044 is a deficient number, since it is larger than the sum of its proper divisors (1230459040).

1640612044 is a wasteful number, since it uses less digits than its factorization.

1640612044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410153015 (or 410153013 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1640612044 is about 40504.4694323972. The cubic root of 1640612044 is about 1179.4203904389.

The spelling of 1640612044 in words is "one billion, six hundred forty million, six hundred twelve thousand, forty-four".