131286777669 has 8 divisors (see below), whose sum is σ = 194498929920. Its totient is φ = 87524518428.

The previous prime is 131286777631. The next prime is 131286777673. The reversal of 131286777669 is 966777682131.

It is not a de Polignac number, because 131286777669 - 2⁹ = 131286777157 is a prime.

It is a super-2 number, since 2×131286777669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131286777679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431236597 + ... + 2431236650.

It is an arithmetic number, because the mean of its divisors is an integer number (24312366240).

Almost surely, 2^131286777669 is an apocalyptic number.

It is an amenable number.

131286777669 is a deficient number, since it is larger than the sum of its proper divisors (63212152251).

131286777669 is an equidigital number, since it uses as much as digits as its factorization.

131286777669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862473256 (or 4862473250 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 131286777669 in words is "one hundred thirty-one billion, two hundred eighty-six million, seven hundred seventy-seven thousand, six hundred sixty-nine".