278504230225 has 81 divisors (see below), whose sum is σ = 392030049747. Its totient is φ = 196165432320.

The previous prime is 278504230183. The next prime is 278504230247. The reversal of 278504230225 is 522032405872.

The square root of 278504230225 is 527735.

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

It can be written as a sum of positive squares in 13 ways, for example, as 271556674321 + 6947555904 = 521111^2 + 83352^2 .

It is not a de Polignac number, because 278504230225 - 2⁷ = 278504230097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 788963649 + ... + 788964001.

Almost surely, 2^278504230225 is an apocalyptic number.

278504230225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

278504230225 is the 527735-th square number.

278504230225 is the 263868-th centered octagonal number.

It is an amenable number.

278504230225 is a deficient number, since it is larger than the sum of its proper divisors (113525819522).

278504230225 is an equidigital number, since it uses as much as digits as its factorization.

278504230225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The spelling of 278504230225 in words is "two hundred seventy-eight billion, five hundred four million, two hundred thirty thousand, two hundred twenty-five".