131805538108 has 12 divisors (see below), whose sum is σ = 230669423152. Its totient is φ = 65899988640.

The previous prime is 131805538103. The next prime is 131805538159. The reversal of 131805538108 is 801835508131.

It is a happy number.

It is a super-3 number, since 3×131805538108³ (a number of 34 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131805538103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586560 + ... + 779527.

Almost surely, 2^131805538108 is an apocalyptic number.

It is an amenable number.

131805538108 is a deficient number, since it is larger than the sum of its proper divisors (98863885044).

131805538108 is a wasteful number, since it uses less digits than its factorization.

131805538108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390212 (or 1390210 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 131805538108 in words is "one hundred thirty-one billion, eight hundred five million, five hundred thirty-eight thousand, one hundred eight".