131689261468438 has 4 divisors (see below), whose sum is σ = 197533892202660. Its totient is φ = 65844630734218.

The previous prime is 131689261468357. The next prime is 131689261468447. The reversal of 131689261468438 is 834864162986131.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×131689261468438² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32922315367108 + ... + 32922315367111.

It is an arithmetic number, because the mean of its divisors is an integer number (49383473050665).

Almost surely, 2^{131689261468438} is an apocalyptic number.

131689261468438 is a deficient number, since it is larger than the sum of its proper divisors (65844630734222).

131689261468438 is an equidigital number, since it uses as much as digits as its factorization.

131689261468438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65844630734221.

The product of its digits is 286654464, while the sum is 70.

The spelling of 131689261468438 in words is "one hundred thirty-one trillion, six hundred eighty-nine billion, two hundred sixty-one million, four hundred sixty-eight thousand, four hundred thirty-eight".