2644010140661 has 4 divisors (see below), whose sum is σ = 2644040644032. Its totient is φ = 2643979637292.

The previous prime is 2644010140637. The next prime is 2644010140691. The reversal of 2644010140661 is 1660410104462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2644010140661 - 2¹⁴ = 2644010124277 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 (2644010140621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15121295 + ... + 15295148.

It is an arithmetic number, because the mean of its divisors is an integer number (661010161008).

Almost surely, 2^{2644010140661} is an apocalyptic number.

It is an amenable number.

2644010140661 is a deficient number, since it is larger than the sum of its proper divisors (30503371).

2644010140661 is an equidigital number, since it uses as much as digits as its factorization.

2644010140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30503370.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 2644010140661 in words is "two trillion, six hundred forty-four billion, ten million, one hundred forty thousand, six hundred sixty-one".