131691223677 has 16 divisors (see below), whose sum is σ = 189371988288. Its totient is φ = 80922082560.

The previous prime is 131691223669. The next prime is 131691223709. The reversal of 131691223677 is 776322196131.

It is a happy number.

It is not a de Polignac number, because 131691223677 - 2³ = 131691223669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131691223577) 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, 2445324 + ... + 2498597.

It is an arithmetic number, because the mean of its divisors is an integer number (11835749268).

Almost surely, 2^131691223677 is an apocalyptic number.

It is an amenable number.

131691223677 is a deficient number, since it is larger than the sum of its proper divisors (57680764611).

131691223677 is a wasteful number, since it uses less digits than its factorization.

131691223677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944620.

The product of its digits is 571536, while the sum is 48.

The spelling of 131691223677 in words is "one hundred thirty-one billion, six hundred ninety-one million, two hundred twenty-three thousand, six hundred seventy-seven".