64705570745564 has 48 divisors (see below), whose sum is σ = 131876177932800. Its totient is φ = 27202921851456.

The previous prime is 64705570745521. The next prime is 64705570745567. The reversal of 64705570745564 is 46554707550746.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64705570745564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705570745567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4545497 + ... + 12250415.

It is an arithmetic number, because the mean of its divisors is an integer number (2747420373600).

Almost surely, 2^{64705570745564} is an apocalyptic number.

It is an amenable number.

64705570745564 is an abundant number, since it is smaller than the sum of its proper divisors (67170607187236).

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

64705570745564 is a wasteful number, since it uses less digits than its factorization.

64705570745564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710642 (or 7710640 counting only the distinct ones).

The product of its (nonzero) digits is 493920000, while the sum is 65.

The spelling of 64705570745564 in words is "sixty-four trillion, seven hundred five billion, five hundred seventy million, seven hundred forty-five thousand, five hundred sixty-four".