278380645325 has 12 divisors (see below), whose sum is σ = 354521514900. Its totient is φ = 216685474560.

The previous prime is 278380645303. The next prime is 278380645339. The reversal of 278380645325 is 523546083872.

It can be written as a sum of positive squares in 6 ways, for example, as 6933393289 + 271447252036 = 83267^2 + 521006^2 .

It is not a de Polignac number, because 278380645325 - 2⁸ = 278380645069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150475100 + ... + 150476949.

It is an arithmetic number, because the mean of its divisors is an integer number (29543459575).

Almost surely, 2^278380645325 is an apocalyptic number.

278380645325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

278380645325 is a deficient number, since it is larger than the sum of its proper divisors (76140869575).

278380645325 is a wasteful number, since it uses less digits than its factorization.

278380645325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300952096 (or 300952091 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 278380645325 in words is "two hundred seventy-eight billion, three hundred eighty million, six hundred forty-five thousand, three hundred twenty-five".