640260201 has 16 divisors (see below), whose sum is σ = 977163264. Its totient is φ = 365289744.

The previous prime is 640260191. The next prime is 640260217. The reversal of 640260201 is 102062046.

It is a happy number.

It is not a de Polignac number, because 640260201 - 2¹⁵ = 640227433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (640260221) 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 in 15 ways as a sum of consecutive naturals, for example, 9975 + ... + 37148.

It is an arithmetic number, because the mean of its divisors is an integer number (61072704).

Almost surely, 2^640260201 is an apocalyptic number.

It is an amenable number.

640260201 is a deficient number, since it is larger than the sum of its proper divisors (336903063).

640260201 is a wasteful number, since it uses less digits than its factorization.

640260201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47780.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 640260201 is about 25303.3634325558. The cubic root of 640260201 is about 861.8906489516.

The spelling of 640260201 in words is "six hundred forty million, two hundred sixty thousand, two hundred one".