278463068416 has 243 divisors, whose sum is σ = 626828205969. Its totient is φ = 123404875776.

The previous prime is 278463068339. The next prime is 278463068419. The reversal of 278463068416 is 614860364872.

It is a happy number.

The square root of 278463068416 is 527696.

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

It can be written as a sum of positive squares in only one way, i.e., 41192761600 + 237270306816 = 202960^2 + 487104^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278463068419) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4719712995 + ... + 4719713053.

Almost surely, 2^278463068416 is an apocalyptic number.

278463068416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

278463068416 is the 527696-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278463068416

278463068416 is an abundant number, since it is smaller than the sum of its proper divisors (348365137553).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278463068416 is an frugal number, since it uses more digits than its factorization.

278463068416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 278463068416 in words is "two hundred seventy-eight billion, four hundred sixty-three million, sixty-eight thousand, four hundred sixteen".