1640201275 has 6 divisors (see below), whose sum is σ = 2033849612. Its totient is φ = 1312161000.

The previous prime is 1640201261. The next prime is 1640201287. The reversal of 1640201275 is 5721020461.

It is not a de Polignac number, because 1640201275 - 2¹¹ = 1640199227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 32804001 + ... + 32804050.

Almost surely, 2^1640201275 is an apocalyptic number.

1640201275 is a deficient number, since it is larger than the sum of its proper divisors (393648337).

1640201275 is an equidigital number, since it uses as much as digits as its factorization.

1640201275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65608061 (or 65608056 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1640201275 is about 40499.3984523227. The cubic root of 1640201275 is about 1179.3219495807.

The spelling of 1640201275 in words is "one billion, six hundred forty million, two hundred one thousand, two hundred seventy-five".