640510262247446 has 8 divisors (see below), whose sum is σ = 968099480343864. Its totient is φ = 317810435466160.

The previous prime is 640510262247409. The next prime is 640510262247503. The reversal of 640510262247446 is 644742262015046.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1222347828455 + ... + 1222347828978.

It is an arithmetic number, because the mean of its divisors is an integer number (121012435042983).

Almost surely, 2^{640510262247446} is an apocalyptic number.

640510262247446 is a deficient number, since it is larger than the sum of its proper divisors (327589218096418).

640510262247446 is a wasteful number, since it uses less digits than its factorization.

640510262247446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444695657566.

The product of its (nonzero) digits is 15482880, while the sum is 53.

The spelling of 640510262247446 in words is "six hundred forty trillion, five hundred ten billion, two hundred sixty-two million, two hundred forty-seven thousand, four hundred forty-six".