136431871281 has 48 divisors (see below), whose sum is σ = 211410321408. Its totient is φ = 84483302400.

The previous prime is 136431871259. The next prime is 136431871313. The reversal of 136431871281 is 182178134631.

136431871281 is a `hidden beast` number, since 1 + 364 + 3 + 1 + 8 + 7 + 1 + 281 = 666.

It is not a de Polignac number, because 136431871281 - 2⁶ = 136431871217 is a prime.

It is a super-2 number, since 2×136431871281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136431871211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3692941 + ... + 3729701.

It is an arithmetic number, because the mean of its divisors is an integer number (4404381696).

Almost surely, 2^136431871281 is an apocalyptic number.

It is an amenable number.

136431871281 is a deficient number, since it is larger than the sum of its proper divisors (74978450127).

136431871281 is a wasteful number, since it uses less digits than its factorization.

136431871281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37102 (or 37099 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 136431871281 in words is "one hundred thirty-six billion, four hundred thirty-one million, eight hundred seventy-one thousand, two hundred eighty-one".