1640401201 has 2 divisors, whose sum is σ = 1640401202. Its totient is φ = 1640401200.

The previous prime is 1640401183. The next prime is 1640401219. The reversal of 1640401201 is 1021040461.

It is a balanced prime because it is at equal distance from previous prime (1640401183) and next prime (1640401219).

It can be written as a sum of positive squares in only one way, i.e., 910590976 + 729810225 = 30176^2 + 27015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640401201 - 2¹¹ = 1640399153 is a prime.

It is a super-2 number, since 2×1640401201² = 5381832200484484802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1640401261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820200600 + 820200601.

It is an arithmetic number, because the mean of its divisors is an integer number (820200601).

Almost surely, 2^1640401201 is an apocalyptic number.

It is an amenable number.

1640401201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640401201 is an equidigital number, since it uses as much as digits as its factorization.

1640401201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1640401201 is about 40501.8666359959. The cubic root of 1640401201 is about 1179.3698639321.

Adding to 1640401201 its reverse (1021040461), we get a palindrome (2661441662).

The spelling of 1640401201 in words is "one billion, six hundred forty million, four hundred one thousand, two hundred one".