438653211481 has 3 divisors (see below), whose sum is σ = 438653873791. Its totient is φ = 438652549172.

The previous prime is 438653211427. The next prime is 438653211523. The reversal of 438653211481 is 184112356834.

The square root of 438653211481 is 662309.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 106347079881 + 332306131600 = 326109^2 + 576460^2 .

It is not a de Polignac number, because 438653211481 - 2¹⁵ = 438653178713 is a prime.

It is a super-2 number, since 2×438653211481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438653211421) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 331155 + ... + 993463.

Almost surely, 2^438653211481 is an apocalyptic number.

438653211481 is the 662309-th square number.

438653211481 is the 331155-th centered octagonal number.

It is an amenable number.

438653211481 is a deficient number, since it is larger than the sum of its proper divisors (662310).

438653211481 is an frugal number, since it uses more digits than its factorization.

438653211481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324618 (or 662309 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 438653211481 in words is "four hundred thirty-eight billion, six hundred fifty-three million, two hundred eleven thousand, four hundred eighty-one".