18644522240071 has 16 divisors (see below), whose sum is σ = 23415412552000. Its totient is φ = 14751709900704.

The previous prime is 18644522240051. The next prime is 18644522240101. The reversal of 18644522240071 is 17004222544681.

It is a happy number.

It is not a de Polignac number, because 18644522240071 - 2¹⁵ = 18644522207303 is a prime.

It is a super-3 number, since 3×18644522240071³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18644522240011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2090657376 + ... + 2090666293.

It is an arithmetic number, because the mean of its divisors is an integer number (1463463284500).

Almost surely, 2^{18644522240071} is an apocalyptic number.

18644522240071 is a deficient number, since it is larger than the sum of its proper divisors (4770890311929).

18644522240071 is an equidigital number, since it uses as much as digits as its factorization.

18644522240071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181323703 (or 4181323689 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 18644522240071 in words is "eighteen trillion, six hundred forty-four billion, five hundred twenty-two million, two hundred forty thousand, seventy-one".