1640471606 has 16 divisors (see below), whose sum is σ = 2488162320. Its totient is φ = 811130880.

The previous prime is 1640471603. The next prime is 1640471621. The reversal of 1640471606 is 6061740461.

It is a super-2 number, since 2×1640471606² = 5382294180184438472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640471603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59966 + ... + 82926.

It is an arithmetic number, because the mean of its divisors is an integer number (155510145).

Almost surely, 2^1640471606 is an apocalyptic number.

1640471606 is a deficient number, since it is larger than the sum of its proper divisors (847690714).

1640471606 is a wasteful number, since it uses less digits than its factorization.

1640471606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23359.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1640471606 is about 40502.7357841418. The cubic root of 1640471606 is about 1179.3867362979.

The spelling of 1640471606 in words is "one billion, six hundred forty million, four hundred seventy-one thousand, six hundred six".