640585186297 has 64 divisors (see below), whose sum is σ = 784358277120. Its totient is φ = 511326376704.

The previous prime is 640585186273. The next prime is 640585186337. The reversal of 640585186297 is 792681585046.

It is a cyclic number.

It is not a de Polignac number, because 640585186297 - 2⁷ = 640585186169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640585183297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 890938704 + ... + 890939422.

It is an arithmetic number, because the mean of its divisors is an integer number (12255598080).

Almost surely, 2^640585186297 is an apocalyptic number.

It is an amenable number.

640585186297 is a deficient number, since it is larger than the sum of its proper divisors (143773090823).

640585186297 is a wasteful number, since it uses less digits than its factorization.

640585186297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 640585186297 in words is "six hundred forty billion, five hundred eighty-five million, one hundred eighty-six thousand, two hundred ninety-seven".