1640017271 has 2 divisors, whose sum is σ = 1640017272. Its totient is φ = 1640017270.

The previous prime is 1640017259. The next prime is 1640017303. The reversal of 1640017271 is 1727100461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640017271 - 2⁶ = 1640017207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640017571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820008635 + 820008636.

It is an arithmetic number, because the mean of its divisors is an integer number (820008636).

Almost surely, 2^1640017271 is an apocalyptic number.

1640017271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640017271 is an equidigital number, since it uses as much as digits as its factorization.

1640017271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 1640017271 is about 40497.1267005451. The cubic root of 1640017271 is about 1179.2778476617.

The spelling of 1640017271 in words is "one billion, six hundred forty million, seventeen thousand, two hundred seventy-one".