2064643608901 has 4 divisors (see below), whose sum is σ = 2186093232972. Its totient is φ = 1943193984832.

The previous prime is 2064643608893. The next prime is 2064643608917. The reversal of 2064643608901 is 1098063464602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1411700422500 + 652943186401 = 1188150^2 + 808049^2 .

It is a cyclic number.

It is not a de Polignac number, because 2064643608901 - 2³ = 2064643608893 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064643608101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60724812010 + ... + 60724812043.

It is an arithmetic number, because the mean of its divisors is an integer number (546523308243).

Almost surely, 2^{2064643608901} is an apocalyptic number.

It is an amenable number.

2064643608901 is a deficient number, since it is larger than the sum of its proper divisors (121449624071).

2064643608901 is a wasteful number, since it uses less digits than its factorization.

2064643608901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121449624070.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 2064643608901 in words is "two trillion, sixty-four billion, six hundred forty-three million, six hundred eight thousand, nine hundred one".