280253117105 has 16 divisors (see below), whose sum is σ = 377919924480. Its totient is φ = 197958053568.

The previous prime is 280253117101. The next prime is 280253117129. The reversal of 280253117105 is 501711352082.

It is a cyclic number.

It is not a de Polignac number, because 280253117105 - 2² = 280253117101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280253117101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93728645 + ... + 93731634.

It is an arithmetic number, because the mean of its divisors is an integer number (23619995280).

Almost surely, 2^280253117105 is an apocalyptic number.

It is an amenable number.

280253117105 is a deficient number, since it is larger than the sum of its proper divisors (97666807375).

280253117105 is a wasteful number, since it uses less digits than its factorization.

280253117105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187460320.

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 280253117105 its reverse (501711352082), we get a palindrome (781964469187).

The spelling of 280253117105 in words is "two hundred eighty billion, two hundred fifty-three million, one hundred seventeen thousand, one hundred five".