280819985896 has 16 divisors (see below), whose sum is σ = 526543143840. Its totient is φ = 140408480880.

The previous prime is 280819985893. The next prime is 280819985933. The reversal of 280819985896 is 698589918082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (280819985893) 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, 1205595 + ... + 1419541.

It is an arithmetic number, because the mean of its divisors is an integer number (32908946490).

Almost surely, 2^280819985896 is an apocalyptic number.

It is an amenable number.

280819985896 is a deficient number, since it is larger than the sum of its proper divisors (245723157944).

280819985896 is a wasteful number, since it uses less digits than its factorization.

280819985896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378024 (or 378020 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 73.

The spelling of 280819985896 in words is "two hundred eighty billion, eight hundred nineteen million, nine hundred eighty-five thousand, eight hundred ninety-six".