7278444511279 has 4 divisors (see below), whose sum is σ = 7278604737280. Its totient is φ = 7278284285280.

The previous prime is 7278444511231. The next prime is 7278444511291. The reversal of 7278444511279 is 9721154448727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7278444511279 - 2¹³ = 7278444503087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278444514279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80044842 + ... + 80135719.

It is an arithmetic number, because the mean of its divisors is an integer number (1819651184320).

Almost surely, 2^{7278444511279} is an apocalyptic number.

7278444511279 is a deficient number, since it is larger than the sum of its proper divisors (160226001).

7278444511279 is a wasteful number, since it uses less digits than its factorization.

7278444511279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160226000.

The product of its digits is 31610880, while the sum is 61.

The spelling of 7278444511279 in words is "seven trillion, two hundred seventy-eight billion, four hundred forty-four million, five hundred eleven thousand, two hundred seventy-nine".