811479251492 has 24 divisors (see below), whose sum is σ = 1747801465536. Its totient is φ = 321024758688.

The previous prime is 811479251449. The next prime is 811479251507. The reversal of 811479251492 is 294152974118.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114668938 + ... + 1114669665.

It is an arithmetic number, because the mean of its divisors is an integer number (72825061064).

Almost surely, 2^811479251492 is an apocalyptic number.

It is an amenable number.

811479251492 is an abundant number, since it is smaller than the sum of its proper divisors (936322214044).

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

811479251492 is a wasteful number, since it uses less digits than its factorization.

811479251492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229338627 (or 2229338625 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 53.

The spelling of 811479251492 in words is "eight hundred eleven billion, four hundred seventy-nine million, two hundred fifty-one thousand, four hundred ninety-two".