2064720661727 has 4 divisors (see below), whose sum is σ = 2099715927240. Its totient is φ = 2029725396216.

The previous prime is 2064720661723. The next prime is 2064720661739. The reversal of 2064720661727 is 7271660274602.

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

It is a cyclic number.

It is not a de Polignac number, because 2064720661727 - 2² = 2064720661723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064720661723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17497632668 + ... + 17497632785.

It is an arithmetic number, because the mean of its divisors is an integer number (524928981810).

Almost surely, 2^{2064720661727} is an apocalyptic number.

2064720661727 is a deficient number, since it is larger than the sum of its proper divisors (34995265513).

2064720661727 is an equidigital number, since it uses as much as digits as its factorization.

2064720661727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34995265512.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 2064720661727 in words is "two trillion, sixty-four billion, seven hundred twenty million, six hundred sixty-one thousand, seven hundred twenty-seven".