64161045427328 has 128 divisors (see below), whose sum is σ = 139366578032640. Its totient is φ = 29302774988800.

The previous prime is 64161045427321. The next prime is 64161045427337. The reversal of 64161045427328 is 82372454016146.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 64161045427328.

It is not an unprimeable number, because it can be changed into a prime (64161045427321) 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, 15157625 + ... + 18922887.

It is an arithmetic number, because the mean of its divisors is an integer number (1088801390880).

Almost surely, 2^{64161045427328} is an apocalyptic number.

64161045427328 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64161045427328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69683289016320).

64161045427328 is an abundant number, since it is smaller than the sum of its proper divisors (75205532605312).

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

64161045427328 is a wasteful number, since it uses less digits than its factorization.

64161045427328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765526 (or 3765514 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 64161045427328 in words is "sixty-four trillion, one hundred sixty-one billion, forty-five million, four hundred twenty-seven thousand, three hundred twenty-eight".