11986697276761 has 3 divisors (see below), whose sum is σ = 11986700738943. Its totient is φ = 11986693814580.

The previous prime is 11986697276747. The next prime is 11986697276777. The reversal of 11986697276761 is 16767279668911.

The square root of 11986697276761 is 3462181.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10998382937161 + 988314339600 = 3316381^2 + 994140^2 .

It is not a de Polignac number, because 11986697276761 - 2⁹ = 11986697276249 is a prime.

It is a super-3 number, since 3×11986697276761³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11986697276261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1731091 + ... + 5193271.

It is an arithmetic number, because the mean of its divisors is an integer number (3995566912981).

Almost surely, 2^{11986697276761} is an apocalyptic number.

11986697276761 is the 3462181-st square number.

11986697276761 is the 1731091-st centered octagonal number.

It is an amenable number.

11986697276761 is a deficient number, since it is larger than the sum of its proper divisors (3462182).

11986697276761 is an frugal number, since it uses more digits than its factorization.

11986697276761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924362 (or 3462181 counting only the distinct ones).

The product of its digits is 576108288, while the sum is 76.

The spelling of 11986697276761 in words is "eleven trillion, nine hundred eighty-six billion, six hundred ninety-seven million, two hundred seventy-six thousand, seven hundred sixty-one".