1640335341 has 16 divisors (see below), whose sum is σ = 2316362240. Its totient is φ = 1029639600.

The previous prime is 1640335337. The next prime is 1640335343. The reversal of 1640335341 is 1435330461.

It is not a de Polignac number, because 1640335341 - 2² = 1640335337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640335299 and 1640335308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640335343) 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 15 ways as a sum of consecutive naturals, for example, 78985 + ... + 97566.

It is an arithmetic number, because the mean of its divisors is an integer number (144772640).

Almost surely, 2^1640335341 is an apocalyptic number.

It is an amenable number.

1640335341 is a deficient number, since it is larger than the sum of its proper divisors (676026899).

1640335341 is a wasteful number, since it uses less digits than its factorization.

1640335341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176736.

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

The square root of 1640335341 is about 40501.0535788885. The cubic root of 1640335341 is about 1179.3540803261.

The spelling of 1640335341 in words is "one billion, six hundred forty million, three hundred thirty-five thousand, three hundred forty-one".