64628316841 has 21 divisors (see below), whose sum is σ = 71465298541. Its totient is φ = 58445407900.

The previous prime is 64628316817. The next prime is 64628316847. The reversal of 64628316841 is 14861382646.

The square root of 64628316841 is 254221.

It is a perfect power (a square), and thus also a powerful number.

64628316841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-64628316841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64628316847) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 338368056 + ... + 338368246.

Almost surely, 2^64628316841 is an apocalyptic number.

64628316841 is the 254221-st square number.

64628316841 is the 127111-st centered octagonal number.

It is an amenable number.

64628316841 is a deficient number, since it is larger than the sum of its proper divisors (6836981700).

64628316841 is an frugal number, since it uses more digits than its factorization.

64628316841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 202 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

Multiplying 64628316841 by its sum of digits (49), we get a square (3166787525209 = 1779547²).

The spelling of 64628316841 in words is "sixty-four billion, six hundred twenty-eight million, three hundred sixteen thousand, eight hundred forty-one".