42644216653 has 4 divisors (see below), whose sum is σ = 42645133888. Its totient is φ = 42643299420.

The previous prime is 42644216651. The next prime is 42644216701. The reversal of 42644216653 is 35661244624.

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 42644216653 - 2¹ = 42644216651 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 (42644216651) 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, 384933 + ... + 483178.

It is an arithmetic number, because the mean of its divisors is an integer number (10661283472).

Almost surely, 2^42644216653 is an apocalyptic number.

It is an amenable number.

42644216653 is a deficient number, since it is larger than the sum of its proper divisors (917235).

42644216653 is an equidigital number, since it uses as much as digits as its factorization.

42644216653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917234.

The product of its digits is 829440, while the sum is 43.

The spelling of 42644216653 in words is "forty-two billion, six hundred forty-four million, two hundred sixteen thousand, six hundred fifty-three".