131781783735056 has 80 divisors (see below), whose sum is σ = 324385929305088. Its totient is φ = 50451728601600.

The previous prime is 131781783734999. The next prime is 131781783735059. The reversal of 131781783735056 is 650537387187131.

It is a happy number.

It is a super-2 number, since 2×131781783735056² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131781783734983 and 131781783735001.

It is not an unprimeable number, because it can be changed into a prime (131781783735059) 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, 1459784975 + ... + 1459875246.

Almost surely, 2^{131781783735056} is an apocalyptic number.

131781783735056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131781783735056 is an abundant number, since it is smaller than the sum of its proper divisors (192604145570032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131781783735056 is a wasteful number, since it uses less digits than its factorization.

131781783735056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919660280 (or 2919660274 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 65.

The spelling of 131781783735056 in words is "one hundred thirty-one trillion, seven hundred eighty-one billion, seven hundred eighty-three million, seven hundred thirty-five thousand, fifty-six".