280706961355 has 4 divisors (see below), whose sum is σ = 336848353632. Its totient is φ = 224565569080.

The previous prime is 280706961299. The next prime is 280706961377. The reversal of 280706961355 is 553169607082.

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

It is not a de Polignac number, because 280706961355 - 2²³ = 280698572747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28070696131 + ... + 28070696140.

It is an arithmetic number, because the mean of its divisors is an integer number (84212088408).

Almost surely, 2^280706961355 is an apocalyptic number.

280706961355 is a deficient number, since it is larger than the sum of its proper divisors (56141392277).

280706961355 is an equidigital number, since it uses as much as digits as its factorization.

280706961355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56141392276.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 280706961355 in words is "two hundred eighty billion, seven hundred six million, nine hundred sixty-one thousand, three hundred fifty-five".