64626066226640 has 40 divisors (see below), whose sum is σ = 150258043703040. Its totient is φ = 25850006752896.

The previous prime is 64626066226627. The next prime is 64626066226663. The reversal of 64626066226640 is 4662266062646.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577144 + ... + 11477783.

It is an arithmetic number, because the mean of its divisors is an integer number (3756451092576).

Almost surely, 2^{64626066226640} is an apocalyptic number.

It is an amenable number.

64626066226640 is an abundant number, since it is smaller than the sum of its proper divisors (85631977476400).

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

64626066226640 is a wasteful number, since it uses less digits than its factorization.

64626066226640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13116819 (or 13116813 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 56.

The spelling of 64626066226640 in words is "sixty-four trillion, six hundred twenty-six billion, sixty-six million, two hundred twenty-six thousand, six hundred forty".