2278651668479 has 8 divisors (see below), whose sum is σ = 2388198038400. Its totient is φ = 2169978178456.

The previous prime is 2278651668451. The next prime is 2278651668493. The reversal of 2278651668479 is 9748661568722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2278651668479 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 (2278651668409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218214629 + ... + 218225070.

It is an arithmetic number, because the mean of its divisors is an integer number (298524754800).

Almost surely, 2^{2278651668479} is an apocalyptic number.

2278651668479 is a deficient number, since it is larger than the sum of its proper divisors (109546369921).

2278651668479 is a wasteful number, since it uses less digits than its factorization.

2278651668479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436439949.

The product of its digits is 487710720, while the sum is 71.

The spelling of 2278651668479 in words is "two trillion, two hundred seventy-eight billion, six hundred fifty-one million, six hundred sixty-eight thousand, four hundred seventy-nine".