811285865004 has 12 divisors (see below), whose sum is σ = 1893000351704. Its totient is φ = 270428621664.

The previous prime is 811285864993. The next prime is 811285865029. The reversal of 811285865004 is 400568582118.

It is a tau number, because it is divible by the number of its divisors (12).

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, 33803577697 + ... + 33803577720.

Almost surely, 2^811285865004 is an apocalyptic number.

It is an amenable number.

811285865004 is an abundant number, since it is smaller than the sum of its proper divisors (1081714486700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811285865004 is a wasteful number, since it uses less digits than its factorization.

811285865004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67607155424 (or 67607155422 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The spelling of 811285865004 in words is "eight hundred eleven billion, two hundred eighty-five million, eight hundred sixty-five thousand, four".