811280479999 has 16 divisors (see below), whose sum is σ = 889817316480. Its totient is φ = 733551588000.

The previous prime is 811280479987. The next prime is 811280480051. The reversal of 811280479999 is 999974082118.

It is not a de Polignac number, because 811280479999 - 2⁹ = 811280479487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811280479949) 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, 1268232 + ... + 1797490.

It is an arithmetic number, because the mean of its divisors is an integer number (55613582280).

Almost surely, 2^811280479999 is an apocalyptic number.

811280479999 is a deficient number, since it is larger than the sum of its proper divisors (78536836481).

811280479999 is a wasteful number, since it uses less digits than its factorization.

811280479999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530022.

The product of its (nonzero) digits is 23514624, while the sum is 67.

The spelling of 811280479999 in words is "eight hundred eleven billion, two hundred eighty million, four hundred seventy-nine thousand, nine hundred ninety-nine".