268640646522 has 8 divisors (see below), whose sum is σ = 537281293056. Its totient is φ = 89546882172.

The previous prime is 268640646493. The next prime is 268640646557. The reversal of 268640646522 is 225646046862.

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

268640646522 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22386720538 + ... + 22386720549.

It is an arithmetic number, because the mean of its divisors is an integer number (67160161632).

Almost surely, 2^268640646522 is an apocalyptic number.

268640646522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

268640646522 is a wasteful number, since it uses less digits than its factorization.

268640646522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44773441092.

The product of its (nonzero) digits is 6635520, while the sum is 51.

The spelling of 268640646522 in words is "two hundred sixty-eight billion, six hundred forty million, six hundred forty-six thousand, five hundred twenty-two".