1640064414 has 8 divisors (see below), whose sum is σ = 3280128840. Its totient is φ = 546688136.

The previous prime is 1640064407. The next prime is 1640064431. The reversal of 1640064414 is 4144600461.

It is a sphenic number, since it is the product of 3 distinct primes.

1640064414 is an admirable number.

It is a super-2 number, since 2×1640064414² = 5379622564138326792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136672029 + ... + 136672040.

It is an arithmetic number, because the mean of its divisors is an integer number (410016105).

Almost surely, 2^1640064414 is an apocalyptic number.

1640064414 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1640064414 is a wasteful number, since it uses less digits than its factorization.

1640064414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273344074.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1640064414 is about 40497.7087500021. The cubic root of 1640064414 is about 1179.2891471693.

Adding to 1640064414 its reverse (4144600461), we get a palindrome (5784664875).

The spelling of 1640064414 in words is "one billion, six hundred forty million, sixty-four thousand, four hundred fourteen".