2140664504465 has 8 divisors (see below), whose sum is σ = 2568825147240. Its totient is φ = 1712513108992.

The previous prime is 2140664504449. The next prime is 2140664504467. The reversal of 2140664504465 is 5644054660412.

It can be written as a sum of positive squares in 4 ways, for example, as 58491904 + 2140606012561 = 7648^2 + 1463081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2140664504465 - 2⁴ = 2140664504449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2140664504467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1791914 + ... + 2737203.

It is an arithmetic number, because the mean of its divisors is an integer number (321103143405).

Almost surely, 2^{2140664504465} is an apocalyptic number.

It is an amenable number.

2140664504465 is a deficient number, since it is larger than the sum of its proper divisors (428160642775).

2140664504465 is an equidigital number, since it uses as much as digits as its factorization.

2140664504465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623651.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 2140664504465 in words is "two trillion, one hundred forty billion, six hundred sixty-four million, five hundred four thousand, four hundred sixty-five".