1640533413 has 8 divisors (see below), whose sum is σ = 2191032000. Its totient is φ = 1091861888.

The previous prime is 1640533387. The next prime is 1640533471. The reversal of 1640533413 is 3143350461.

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

It is a cyclic number.

It is not a de Polignac number, because 1640533413 - 2¹⁰ = 1640532389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640533483) 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, 454668 + ... + 458261.

It is an arithmetic number, because the mean of its divisors is an integer number (273879000).

Almost surely, 2^1640533413 is an apocalyptic number.

It is an amenable number.

1640533413 is a deficient number, since it is larger than the sum of its proper divisors (550498587).

1640533413 is an equidigital number, since it uses as much as digits as its factorization.

1640533413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913531.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 1640533413 is about 40503.4987747972. The cubic root of 1640533413 is about 1179.4015477786.

Adding to 1640533413 its reverse (3143350461), we get a palindrome (4783883874).

The spelling of 1640533413 in words is "one billion, six hundred forty million, five hundred thirty-three thousand, four hundred thirteen".