1640365334 has 8 divisors (see below), whose sum is σ = 2494254360. Its totient is φ = 808947216.

The previous prime is 1640365277. The next prime is 1640365339. The reversal of 1640365334 is 4335630461.

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

It is a junction number, because it is equal to n+sod(n) for n = 1640365294 and 1640365303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640365339) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5617544 + ... + 5617835.

It is an arithmetic number, because the mean of its divisors is an integer number (311781795).

Almost surely, 2^1640365334 is an apocalyptic number.

1640365334 is a deficient number, since it is larger than the sum of its proper divisors (853889026).

1640365334 is a wasteful number, since it uses less digits than its factorization.

1640365334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235454.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 1640365334 is about 40501.4238515142. The cubic root of 1640365334 is about 1179.3612683180.

Adding to 1640365334 its reverse (4335630461), we get a palindrome (5975995795).

The spelling of 1640365334 in words is "one billion, six hundred forty million, three hundred sixty-five thousand, three hundred thirty-four".