969518991811 has 4 divisors (see below), whose sum is σ = 969786596592. Its totient is φ = 969251387032.

The previous prime is 969518991781. The next prime is 969518991877. The reversal of 969518991811 is 118199815969.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118199815969 = 299447 ⋅394727.

It is a cyclic number.

It is not a de Polignac number, because 969518991811 - 2¹³ = 969518983619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (969518991911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133796956 + ... + 133804201.

It is an arithmetic number, because the mean of its divisors is an integer number (242446649148).

Almost surely, 2^969518991811 is an apocalyptic number.

969518991811 is a deficient number, since it is larger than the sum of its proper divisors (267604781).

969518991811 is a wasteful number, since it uses less digits than its factorization.

969518991811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267604780.

The product of its digits is 12597120, while the sum is 67.

The spelling of 969518991811 in words is "nine hundred sixty-nine billion, five hundred eighteen million, nine hundred ninety-one thousand, eight hundred eleven".