1640119927 has 4 divisors (see below), whose sum is σ = 1671065640. Its totient is φ = 1609174216.

The previous prime is 1640119907. The next prime is 1640119933. The reversal of 1640119927 is 7299110461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7299110461 = 823 ⋅8868907.

It is a cyclic number.

It is not a de Polignac number, because 1640119927 - 2⁷ = 1640119799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1640119927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640119907) 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, 15472777 + ... + 15472882.

It is an arithmetic number, because the mean of its divisors is an integer number (417766410).

Almost surely, 2^1640119927 is an apocalyptic number.

1640119927 is a deficient number, since it is larger than the sum of its proper divisors (30945713).

1640119927 is an equidigital number, since it uses as much as digits as its factorization.

1640119927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30945712.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1640119927 is about 40498.3941286565. The cubic root of 1640119927 is about 1179.3024525694.

The spelling of 1640119927 in words is "one billion, six hundred forty million, one hundred nineteen thousand, nine hundred twenty-seven".