280423202557 has 2 divisors, whose sum is σ = 280423202558. Its totient is φ = 280423202556.

The previous prime is 280423202459. The next prime is 280423202569. The reversal of 280423202557 is 755202324082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171479638201 + 108943564356 = 414101^2 + 330066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280423202557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280423200557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140211601278 + 140211601279.

It is an arithmetic number, because the mean of its divisors is an integer number (140211601279).

Almost surely, 2^280423202557 is an apocalyptic number.

It is an amenable number.

280423202557 is a deficient number, since it is larger than the sum of its proper divisors (1).

280423202557 is an equidigital number, since it uses as much as digits as its factorization.

280423202557 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 280423202557 in words is "two hundred eighty billion, four hundred twenty-three million, two hundred two thousand, five hundred fifty-seven".