6244644454661 has 4 divisors (see below), whose sum is σ = 6247787206752. Its totient is φ = 6241501702572.

The previous prime is 6244644454621. The next prime is 6244644454663. The reversal of 6244644454661 is 1664544464426.

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 6244644454661 - 2¹⁸ = 6244644192517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6244644454597 and 6244644454606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6244644454663) 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, 1571373065 + ... + 1571377038.

It is an arithmetic number, because the mean of its divisors is an integer number (1561946801688).

Almost surely, 2^{6244644454661} is an apocalyptic number.

It is an amenable number.

6244644454661 is a deficient number, since it is larger than the sum of its proper divisors (3142752091).

6244644454661 is a wasteful number, since it uses less digits than its factorization.

6244644454661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142752090.

The product of its digits is 53084160, while the sum is 56.

The spelling of 6244644454661 in words is "six trillion, two hundred forty-four billion, six hundred forty-four million, four hundred fifty-four thousand, six hundred sixty-one".