280861418225 has 12 divisors (see below), whose sum is σ = 349380846156. Its totient is φ = 223971271680.

The previous prime is 280861418209. The next prime is 280861418251. The reversal of 280861418225 is 522814168082.

It can be written as a sum of positive squares in 6 ways, for example, as 118451612224 + 162409806001 = 344168^2 + 403001^2 .

It is not a de Polignac number, because 280861418225 - 2⁴ = 280861418209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280861418225.

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, 17938592 + ... + 17954241.

It is an arithmetic number, because the mean of its divisors is an integer number (29115070513).

Almost surely, 2^280861418225 is an apocalyptic number.

280861418225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280861418225 is a deficient number, since it is larger than the sum of its proper divisors (68519427931).

280861418225 is a wasteful number, since it uses less digits than its factorization.

280861418225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35893156 (or 35893151 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 47.

The spelling of 280861418225 in words is "two hundred eighty billion, eight hundred sixty-one million, four hundred eighteen thousand, two hundred twenty-five".