640230835587 has 16 divisors (see below), whose sum is σ = 988954091520. Its totient is φ = 360834599232.

The previous prime is 640230835577. The next prime is 640230835603. The reversal of 640230835587 is 785538032046.

It is a happy number.

It is not a de Polignac number, because 640230835587 - 2²⁴ = 640214058371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640230835567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208814787 + ... + 208817852.

It is an arithmetic number, because the mean of its divisors is an integer number (61809630720).

Almost surely, 2^640230835587 is an apocalyptic number.

640230835587 is a deficient number, since it is larger than the sum of its proper divisors (348723255933).

640230835587 is a wasteful number, since it uses less digits than its factorization.

640230835587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417632722.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 640230835587 in words is "six hundred forty billion, two hundred thirty million, eight hundred thirty-five thousand, five hundred eighty-seven".