2238647534881 has 2 divisors, whose sum is σ = 2238647534882. Its totient is φ = 2238647534880.

The previous prime is 2238647534843. The next prime is 2238647534909. The reversal of 2238647534881 is 1884357468322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2150355355281 + 88292179600 = 1466409^2 + 297140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2238647534881 is a prime.

It is a super-3 number, since 3×2238647534881³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2238647534801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119323767440 + 1119323767441.

It is an arithmetic number, because the mean of its divisors is an integer number (1119323767441).

Almost surely, 2^{2238647534881} is an apocalyptic number.

It is an amenable number.

2238647534881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238647534881 is an equidigital number, since it uses as much as digits as its factorization.

2238647534881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61931520, while the sum is 61.

The spelling of 2238647534881 in words is "two trillion, two hundred thirty-eight billion, six hundred forty-seven million, five hundred thirty-four thousand, eight hundred eighty-one".