1640340606 has 32 divisors (see below), whose sum is σ = 3305975040. Its totient is φ = 542578176.

The previous prime is 1640340503. The next prime is 1640340613. The reversal of 1640340606 is 6060430461.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 618375 + ... + 621021.

It is an arithmetic number, because the mean of its divisors is an integer number (103311720).

Almost surely, 2^1640340606 is an apocalyptic number.

1640340606 is an abundant number, since it is smaller than the sum of its proper divisors (1665634434).

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

1640340606 is a wasteful number, since it uses less digits than its factorization.

1640340606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1640340606 is about 40501.1185771455. The cubic root of 1640340606 is about 1179.3553421194.

The spelling of 1640340606 in words is "one billion, six hundred forty million, three hundred forty thousand, six hundred six".