640587241542527 has 8 divisors (see below), whose sum is σ = 646811017935264. Its totient is φ = 634363551357408.

The previous prime is 640587241542503. The next prime is 640587241542529. The reversal of 640587241542527 is 725245142785046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640587241542527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640587241542527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640587241542529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6567848 + ... + 36391085.

It is an arithmetic number, because the mean of its divisors is an integer number (80851377241908).

Almost surely, 2^{640587241542527} is an apocalyptic number.

640587241542527 is a deficient number, since it is larger than the sum of its proper divisors (6223776392737).

640587241542527 is a wasteful number, since it uses less digits than its factorization.

640587241542527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43103809.

The product of its (nonzero) digits is 150528000, while the sum is 62.

The spelling of 640587241542527 in words is "six hundred forty trillion, five hundred eighty-seven billion, two hundred forty-one million, five hundred forty-two thousand, five hundred twenty-seven".