811849766289 has 16 divisors (see below), whose sum is σ = 1113379092672. Its totient is φ = 525907243008.

The previous prime is 811849766281. The next prime is 811849766291. The reversal of 811849766289 is 982667948118.

It is not a de Polignac number, because 811849766289 - 2³ = 811849766281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811849766281) 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, 16279272 + ... + 16329065.

It is an arithmetic number, because the mean of its divisors is an integer number (69586193292).

Almost surely, 2^811849766289 is an apocalyptic number.

It is an amenable number.

811849766289 is a deficient number, since it is larger than the sum of its proper divisors (301529326383).

811849766289 is a wasteful number, since it uses less digits than its factorization.

811849766289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32608576.

The product of its digits is 83607552, while the sum is 69.

The spelling of 811849766289 in words is "eight hundred eleven billion, eight hundred forty-nine million, seven hundred sixty-six thousand, two hundred eighty-nine".