2664544464437 has 4 divisors (see below), whose sum is σ = 2664609309516. Its totient is φ = 2664479619360.

The previous prime is 2664544464433. The next prime is 2664544464467. The reversal of 2664544464437 is 7344644454662.

It is a happy number.

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 1042510429156 + 1622034035281 = 1021034^2 + 1273591^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664544464437 - 2² = 2664544464433 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 (2664544464433) 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, 32360864 + ... + 32443097.

It is an arithmetic number, because the mean of its divisors is an integer number (666152327379).

Almost surely, 2^{2664544464437} is an apocalyptic number.

It is an amenable number.

2664544464437 is a deficient number, since it is larger than the sum of its proper divisors (64845079).

2664544464437 is an equidigital number, since it uses as much as digits as its factorization.

2664544464437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64845078.

The product of its digits is 185794560, while the sum is 59.

The spelling of 2664544464437 in words is "two trillion, six hundred sixty-four billion, five hundred forty-four million, four hundred sixty-four thousand, four hundred thirty-seven".