640362001 has 16 divisors (see below), whose sum is σ = 685964160. Its totient is φ = 595687680.

The previous prime is 640361999. The next prime is 640362007. The reversal of 640362001 is 100263046.

It is a cyclic number.

It is not a de Polignac number, because 640362001 - 2¹ = 640361999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640362007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598495 + ... + 599563.

It is an arithmetic number, because the mean of its divisors is an integer number (42872760).

Almost surely, 2^640362001 is an apocalyptic number.

It is an amenable number.

640362001 is a deficient number, since it is larger than the sum of its proper divisors (45602159).

640362001 is a wasteful number, since it uses less digits than its factorization.

640362001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 640362001 is about 25305.3749428852. The cubic root of 640362001 is about 861.9363261196.

It can be divided in two parts, 64036 and 2001, that multiplied together give a triangular number (128136036 = T₁₆₀₀₈).

The spelling of 640362001 in words is "six hundred forty million, three hundred sixty-two thousand, one".