2278651668481 has 4 divisors (see below), whose sum is σ = 2331643567792. Its totient is φ = 2225659769172.

The previous prime is 2278651668451. The next prime is 2278651668493. The reversal of 2278651668481 is 1848661568722.

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.

It is a cyclic number.

It is not a de Polignac number, because 2278651668481 - 2⁷ = 2278651668353 is a prime.

It is a super-2 number, since 2×2278651668481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278651668451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26495949591 + ... + 26495949676.

It is an arithmetic number, because the mean of its divisors is an integer number (582910891948).

Almost surely, 2^{2278651668481} is an apocalyptic number.

It is an amenable number.

2278651668481 is a deficient number, since it is larger than the sum of its proper divisors (52991899311).

2278651668481 is an equidigital number, since it uses as much as digits as its factorization.

2278651668481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52991899310.

The product of its digits is 61931520, while the sum is 64.

The spelling of 2278651668481 in words is "two trillion, two hundred seventy-eight billion, six hundred fifty-one million, six hundred sixty-eight thousand, four hundred eighty-one".