18652049780641 has 4 divisors (see below), whose sum is σ = 18652058521792. Its totient is φ = 18652041039492.

The previous prime is 18652049780629. The next prime is 18652049780681. The reversal of 18652049780641 is 14608794025681.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18652049780641 - 2¹⁹ = 18652049256353 is a prime.

It is a super-2 number, since 2×18652049780641² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18652049780641.

It is not an unprimeable number, because it can be changed into a prime (18652049780681) 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, 1179196 + ... + 6220498.

It is an arithmetic number, because the mean of its divisors is an integer number (4663014630448).

Almost surely, 2^{18652049780641} is an apocalyptic number.

It is an amenable number.

18652049780641 is a deficient number, since it is larger than the sum of its proper divisors (8741151).

18652049780641 is an equidigital number, since it uses as much as digits as its factorization.

18652049780641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741150.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 18652049780641 in words is "eighteen trillion, six hundred fifty-two billion, forty-nine million, seven hundred eighty thousand, six hundred forty-one".