278048453809 has 9 divisors (see below), whose sum is σ = 323448413547. Its totient is φ = 238324082304.

The previous prime is 278048453779. The next prime is 278048453827. The reversal of 278048453809 is 908354840872.

It is a happy number.

The square root of 278048453809 is 527303.

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., 28528223409 + 249520230400 = 168903^2 + 499520^2 .

It is not a de Polignac number, because 278048453809 - 2²⁵ = 278014899377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278048450809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3653457 + ... + 3728785.

Almost surely, 2^278048453809 is an apocalyptic number.

278048453809 is the 527303-rd square number.

278048453809 is the 263652-nd centered octagonal number.

It is an amenable number.

278048453809 is a deficient number, since it is larger than the sum of its proper divisors (45399959738).

278048453809 is an frugal number, since it uses more digits than its factorization.

278048453809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150672 (or 75336 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 278048453809 in words is "two hundred seventy-eight billion, forty-eight million, four hundred fifty-three thousand, eight hundred nine".