280725666251 has 4 divisors (see below), whose sum is σ = 280814422392. Its totient is φ = 280636910112.

The previous prime is 280725666217. The next prime is 280725666359. The reversal of 280725666251 is 152666527082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280725666251 - 2⁶ = 280725666187 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 280725666251.

It is not an unprimeable number, because it can be changed into a prime (280725266251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44373326 + ... + 44379651.

It is an arithmetic number, because the mean of its divisors is an integer number (70203605598).

Almost surely, 2^280725666251 is an apocalyptic number.

280725666251 is a deficient number, since it is larger than the sum of its proper divisors (88756141).

280725666251 is an equidigital number, since it uses as much as digits as its factorization.

280725666251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88756140.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 280725666251 in words is "two hundred eighty billion, seven hundred twenty-five million, six hundred sixty-six thousand, two hundred fifty-one".