131277843738 has 12 divisors (see below), whose sum is σ = 284435328138. Its totient is φ = 43759281240.

The previous prime is 131277843733. The next prime is 131277843779. The reversal of 131277843738 is 837348772131.

131277843738 is a `hidden beast` number, since 13 + 127 + 78 + 437 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96725354049 + 34552489689 = 311007^2 + 185883^2 .

It is not an unprimeable number, because it can be changed into a prime (131277843733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3646606753 + ... + 3646606788.

Almost surely, 2^131277843738 is an apocalyptic number.

131277843738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131277843738 is an abundant number, since it is smaller than the sum of its proper divisors (153157484400).

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

131277843738 is a wasteful number, since it uses less digits than its factorization.

131277843738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7293213549 (or 7293213546 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 131277843738 in words is "one hundred thirty-one billion, two hundred seventy-seven million, eight hundred forty-three thousand, seven hundred thirty-eight".