18743574632641 has 2 divisors, whose sum is σ = 18743574632642. Its totient is φ = 18743574632640.

The previous prime is 18743574632617. The next prime is 18743574632669. The reversal of 18743574632641 is 14623647534781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18428741422641 + 314833210000 = 4292871^2 + 561100^2 .

It is a cyclic number.

It is not a de Polignac number, because 18743574632641 - 2¹¹ = 18743574630593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18743574632641.

It is not a weakly prime, because it can be changed into another prime (18743554632641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9371787316320 + 9371787316321.

It is an arithmetic number, because the mean of its divisors is an integer number (9371787316321).

Almost surely, 2^{18743574632641} is an apocalyptic number.

It is an amenable number.

18743574632641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18743574632641 is an equidigital number, since it uses as much as digits as its factorization.

18743574632641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 61.

The spelling of 18743574632641 in words is "eighteen trillion, seven hundred forty-three billion, five hundred seventy-four million, six hundred thirty-two thousand, six hundred forty-one".